mr.gurney - actually i like the G35C's drivetrain as it is not very refined. the engine and tranny has a very mechanical almost rough feel which gives the car soul. that is where the 370Z kind of lacks life for me when i drove it the first time along with the overall dynamics. oddly, the 370Z feels more grown up almost.
the thing i'd like to change on my G35C is the dash. it is just not a very finished appearance. for me though, it's fine as im not really into luxury cars.