Well - I'll post and update. Here's the car with new rims, tires and ceramic tint.
The rims are 18 inch Prodrive GT1s. Prodrive is the company that constructed the World Rally Subaru cars as well as the ALMS GT1 Astons. They still manufacture a number of Subaru Rally cars for different championships. Even going up to a larger wheel (17 to 18) I'm saving about 4 pounds a wheel. I installed them using McGard Spline Drive Lugs.
The tires are 225/40 R18 Dunlop Direzza Z1 Star Specs. Total overkill for a daily driver and so sticky that they pick up everything on the road (wrappers, stones - you name it). Totally worth it though, IMO.
There is a significant performance difference with the tire upgrade alone. The lighter wheels have definitely improved turn-in.
A special thanks to Rrocket for being my Windsor-Detriot chaperon, and letting me drive the

out of his modded IS 350. The enthusiasts on this site should get together more often.
The car is really dirty but here are some pics nonetheless.




