Honestly everyone of those cars has it ups and downs...G8 is still new and might void a warranty if you do something to it and stuff is more expensive...GTO is HEAVY...and the G37 is hard to mod as the PCM doesn't take mods at all...

Ups though...G37 is a sexy car...pricey but beautiful...that VQ motor is awesome sounding and gets the best mp's out of the bunch IMO, just gotta look past the fact it is a Nissan. G8 is well...the G8...nothing like hauling 5 people and still kicking the crap out of a Mustang or a rice bucket The GTO is American History, rides great, handles good, strong aftermarket and cheap cheap cheap for what you get.

But all in all...I say G8. IF you can swing the money there are a lo of upgrades out there for it and they have all the new amenities of a brand new technologically advanced car...remember...BMW 5 Series for more than half the price. If not, then go the way of the goat. It is a awesome car. Ran with me though tuned, header back, cai, ported TB, etc... YouTube - 03 Camed GTP Vs Bolt on 04 GTO