I'm not crazy about cars, but I've always been a fan of a few.
BMW Series
Audi (anything Audi gets my vote)
GMC Topkick C4500 (but that's only because it is Ironhide's disguise

)
Although realistically; I don't need a 4x4 or a truck in the middle of a city, and speed limits (plus a ridiculous price tag) would stand between me owning a fast car like the high-end Audis. So, and without sounding too snob, I'd settle for a hybrid - at least it'll do something useful towards helping our fucked up planet.