I have a 2010 g37 and just wanted to know if you have these wheels of so what is the perfect size I don't wanna roll my fenders ect maybe just get some springs?

 

They look nice (and expensive). What look are you after, how low do you want to drop, what size tires do you want to run, etc.
A 8.5/10" stagger, 9/10.5 stagger, a square setup, flush fit, hellas-flush, lots of setups to consider.