I've worked on and rebuilt several Audis and VWs and feel that there really is a point when a car is over-engineered and they are definitely there. Any car which requires the removal of the front of the car to get to the alternator is not my idea of fun. Also I'm not too hip on the fiberglass radiator support which makes for some very expensive minor fender benders. Especially if you go over the front bumper beam which happens alot in a collision with a large SUV. I will say they are nice but no thanks, I'll spend my money on both a Titan SE and a Altima SE-R for a few dollars more since my Z32 is my super fast and super comfortable tourer anyway. Also my Altima is no slouch either... I would definitely consider a new G35 Sport Sedan with 298hp and a six-speed if I was going to spend the 40K on a performance sedan.
I guess I believe in the products that Nissan produces more than others.
Troy