Why by tires for $500 or more when you can get tires and rims for the same price!?
18" Enkei Bortex rims and Pirelli Super Sport P7000 tires. Bolt pattern is 4.5"x5 by 7.5 wide (114.3x5 for you metric guys). The tires are are Pirelli Super Sport P7000 225/40/18 with 80% on two tires and 40% on the other two. One of the rims has a small ding pictured below, but it doesn't effect the wheel.
Price: $500