Depends on what you want out of the car. Is it going to be your daily driver or weekend / track car? If you're concerned about the modability, I think all three cars will have a great diverse aftermarket after some time. Personally I chose the 135 because I wanted something that had more room, power and luxury than my old s2k. The 135 doesn't handle as good as the s2k or have as precise of a shifter, but the pros outweighed the cons in my circumstance. As for the 370z, it looks like Nissan did their homework and is going to make a great car for the money.
The Camaro SS I'll have to do some research on, either way it's all going to be good
