Somebody has a GTR in the lofts I live in. Ass is very nice, but the car is GINORMOUS. Other than the butt, I can't say I like it.
I'm hoping not to sound too snobbish, but I like the M's better. They are not nearly as flashy or gaudy. I like the subtle, possibly sleeper, look of our cars. I know some enjoy the look of a heavily modded car, but the GTR is too "ricey" for me. I said the same thing about the RX8's when they came out. They are both too busy looking.
If I can, I'll try to park next to it so you all can see the size difference.