Gallardo VS Viper VS LFA
The Gallardo's nice, but it's pretty long in tooth now. The Viper's also very nice, but I'm just not a Viper guy. The LFA, though it doesn't actually excite me, is the better car. It's overengineered, which is something you rarely see in new cars. It's built to meticulous details, and comes at a hefty price. The hefty price is worth it, though.
E39 VS E60 VS S6 VS RS6
The E60's immediately out, I'm starting to tire of its exterior, and I just don't like the interior. The S6 just looks too boring inside and out, especially to the much more expensive-looking '13 S6. It just looks like a big Passat, except without the old Passat's ugly interior. The old RS6 is a nice car, but it too is a little to bland inside, and that roofline just screams Passat. Not to mention, old Audis are a ticking time bomb for electrical issues. So that leaves the E39, which benefits from timeless styling, a conservative but elegant interior, rear wheel drive, and enough money left over to paint it a different color, because maroon is a terrible color.
Fiesta VS Abarth VS Mini VS Veloster
Could be biased on this one. I've driven three Minis, and the newer ones are by far more comfortable than '02-'06 models. The steering is lighter but still very direct, and they still handle very well. They're also more responsive than the supercharged '06 I'm used to driving. The Abarth is too feminine, and the Veloster just won't handle as good as these cars. The Fiesta's a solid choice, but it's no Mini. The Mini's got the better retro looks than the Fiat, has a fairly sporty driving position (you really do sit far back into the car), is more customizable from the factory, and is just a cooler car.
AMG VS AMG VS AMG
The two CLKs are out, they just look too ridiculous, which leaves the C63, which has aggressive styling to complement its ridiculous bodykit, and has a better interior.
2013 BMW 128i M-Sport - Brand New ~ $34,000
2008 BMW 335i Coupe - 30,250 Miles - $33,500