If you're one of the million gamers laying virtual tracks in Forza Motorsports 3, the Hot Holiday DLC pack offers ten cars with a combined 5,649 HP. Below, discover why you'll want these bruisers in your virtual garage.

Year: 2010
Make: Nissan
Model: GT-R SpecV
Power: 478 HP
Why It's Hot: "It's no secret Nissan has done everything right when it comes to the GT-R. The car has tamed the Nurburgring, besting supercars that cost far more money while delivering real world reliability and daily drivability. Like the Spec-Vs of early 1990s Skyline GT-R fame the latest rendition of Nissan's factory special edition takes the car to a whole new level. The Spec-V is currently a Land of the Rising Sun only proposition, making its inclusion on the Forza 3 DLC a real treat for players around the world."

Year: 2010
Make: Ferrari
Model: 599XX
Power: 700 HP
Why It's Hot: "The XX in the Ferrari 599XX badge gives clues to its experimental mission. The car is basically a library book that needs to be checked out at the front desk and the library is in Maranello. While based on the 599 GTB Fiorano, with the same transaxle layout and engine type, this prototype is an extreme track car. It is not road legal and its performance envelope has been stretched to brink of rupturing."

Year: 2009
Make: Aston Martin
Model:#007 Racing Lola LMP1
Power: 650 HPs
Why It's Hot: "Step up to big-time racing in this stunning Lola chassised, V12 Aston Martin-powered masterpiece. Built to Le Mans LMP1 specification the Aston Martin Racing (AMR) Lola was tasked to take down the oil-burners at the 2009 24 Hours of Le Mans on the 50th anniversary of Aston's win at la Sarthe. In 1959 Roy Salvadori and none other than Carroll Shelby took out Ferrari Scuderia's 250 GT with the famous Aston Martin DB1."

Year: 2010
Make: Jaguar
Model: XFR
Power: 510 HP
Why It's Hot: "Any thoughts of Tata sitting on Jaguar's laurels go out the window with one look at the sensuous XFR. The regular XF, which replaces the S-Type, has resurrected the brand and given Jaguar a bit more spring in its step. The full-tilt boogie high-performance R model takes the XF to the next level, delivering performance and luxury in a neatly wrapped package. A totally revamped AJ Series V8 displacing 5.0 liters has been supercharged and super-tuned to pound out 510 horsepower and 460 lbs-ft of torque which puts the XFR squarely in M5 and AMG territory."

Year: 2009
Make: Audi
Model: #2 Sport Team Joest R15 TDI
Power: 600+ HP
Why It's Hot: "Audi's recent Le Mans success started with the gasoline powered R8's win in 2004 and saw its diesel dominance take full effect with overall 24 Hours of Le Mans wins in '05, ‘06, '07 and '08 with the V12 TDI R10. The R15 is the evolution of the concept. The powerplants hard specs include a pair of Garrett turbochargers, four-valves per cylinder, DOHC, two 37.9mm engine air-intake restrictors (stipulated by regulations) and maximum turbo pressure of 2.75 bar absolute, diesel direct injection TDI®, fully stressed aluminum crankcase, and a Bosch MS14 engine management system."

Year: 2010
Make: Mercedes
Model: SLR Stirling Moss
Power: 650 HP
Why It's Hot: "The SLR Stirling Moss is retro but innovative. There is neither a roof nor a windscreen to separate the driver and passenger from the outside world; they enjoy unadulterated high-speed excitement with all the attributes of a true open ‘al fresco' speedster. The body, a fully carbon fiber masterpiece, is pointy at the nose with deep-grooved accents and a wide-open cockpit. The humps behind driver and passenger serve as rollover protection and air scoops. Peak beneath the bonnet and you're greeted by a 650 horsepower, AMG-sourced supercharged V8 that displaces 5.4 liters. 0-60 whizzes by in 3.4 seconds and, if your hair can handle the turbulence, the SLR will top out in the neighborhood of 215 mph. This sparkling performance costs a petty penny, 750,000 Euros or a tad over $1 Million."

Year: 2010
Make: Lamborghini
Model: Murcielago LP 670-4 SV
Power: 661 HP
Why It's Hot: "The ‘SV' at the end of the name stands for Super Veloce, a moniker reserved for Lambos with a little extra punch under the loud pedal. Also the ‘4' prior to the ‘SV' equates to all-wheel drive. In this case the Super V its 6.5-liter V12 develops 29 more horsepower, topping out at 661 compared to 632 in a standard Murcielago. The added gusto comes complements of revised valve timing and alterations of the intake system. The hard data on the Prancing Bull's mid-ship-mounted V12 include an 88.0 mm bore, 89.0 mm stroke, 11:1 compression ratio, double overhead cams, variable valve timing and four valves per cylinder."

Year: 2010
Make: Ferrari
Model: 458 Italia
Power: 570 HP
Why It's Hot: "Maranello brought its A-Game, giving the 458 Italia the best of the best. Its all-new aluminum chassis structure has been endowed with a highly functional body the 458 has just enough resemblance to its predecessor, the F430, to recognize the bloodline. The 458 Italia is a combination of banned F1 active-aero technology and the voluptuous vision of the Pininfarina design house. The 458 features ‘aerolastic' spoilers in front that shape shift as the car accelerates altering the flow of air into the radiator and decreasing drag. Pininfarina provided the classic Ferrari elements; five-spoke star wheels, Prancing Horse fender badges and V8-under-glass engine presentation. But Pininfarina's sculpted character lines, flowing fender treatment, high-tech LED headlamps and scowling front fascia take the Italia to the next level."

Year: 2010
Make: Audi
Model: S4
Power: 333 HP
Why It's Hot: "The ‘S' designation means big performance for Audi fanatics. S models come with standard Quattro all-wheel drive, pumped up engines, big brakes and sport tuned suspensions as well as unique interior and exterior styling cues compared to its ‘A' designated siblings. With its penchant for poshness in recent editions some people say the ‘S' in the S4 has stood more for Style than performance. For 2010 the ‘S' stands for Scintillating.

The 2010 edition pounds the pavement with a direct-injection supercharged V6 in place of turbo V6 and V8 offerings found in previous S4s. The 3.0-liter blown V6 pumps out 333 horsepower. The new powertrain is only 11 horses shy of the V8 but provides a 23 lbs-ft gain in torque, enhancing the sedan's low-end grunt and overall drivability. Shifting can be accomplished with either a six-speed manual or seven-speed dual-clutch automatic. The latter delivering quicker acceleration and improved fuel economy, 27 percent better than the previous S4."

Year: 2010
Make: Porsche
Model: Panamera Turbo
Power: 500 HP
Why It's Hot: Because including a Cayenne in a DLC of "Hot Holiday" cars is wrong, the Panamera Turbo is the only four-door Porsche we'd consider taking to the track. Though the engine is on the wrong side of the car, the übersedan still puts down 500 HP from its twin-turbo V8. It's enough juice to take three of your friends and their golf bags to 62 MPH from a cold start in just 4.2 seconds.

The DLC pack is downloadable today and costs 400 Microsoft points.