I've got 17s, but my car originally came with 19s, so it has the sport suspension/LSD. I wouldn't say the ride is that great, its better than the 19s, but the only way to see a significant increase in ride quality is with the softer suspension.

 

thanks.

Im shopping for USED G35s so its hard finding exactly the right combination of everything i want. I guess if i find one with sport suspension and 18's i'll just put a softer suspension in it. wonder if that'll make the wheels rub in the wheelwell?