Earlier today we shared with you a list of what someone else thought the 10 Best New Road Trip Cars were. Though we like the listmaker's spunk in naming the Veyron, we disagree with the notion that only new cars are best for road trips (and with the idea of crossing the country in an Eos). It does bring up the question not only of what is the best road tripping car, but what makes the best road tripping car. Is it size? Mileage? Speed? Comfort? Stealth? The perfect combination of all of these features?