My car didn't come with the stock wheels, and I'm looking for a spare set.

This guy in my area is selling some 18" 08-09 G35X sedan wheels, and i was wondering if these wheels would fit ok? would there be any issues? from what i understand the G35 coupe has staggered stock tires, but not sure what tires the sedan runs, so what would be acceptable tire specs to have on the coupe?

Also, just for matter of opinion do you guys even think these wheels would look good on the coupe? i can't really visualize how they would look like, and i'm wondering if anyone has seen this setup or has a picture. for some reason in my mind i think they may look weird on the coupe, but i'm not sure, maybe i'm better off finding the actual coupe wheels.

These are the wheels i'm talking about: