I guess my number one concern with a car is uniqueness. I hate having a car eveyone else has. Number 2 is power I guess. I just know today I went out for lucnh and saw 4 G35's in like 15 minutes. Saw 1 350z (in my parking garage). I saw 1 03 cobra this morning and I have never once seen a mach 1 out on the road. So unless the g35 has something incredible about it that I can't live without I'll prolly get the mustang. I drove a 2003 GT last week kuz their mach 1 was getting service. My first time ina newer mustang. I dream about it every night still. That's a good hint...