I'm completely dissatisfied with the miniscule selection in 18/19 inch rims offered by tirerack and discount tire. superbuytires.com has a great selection but they are overpriced. after owning 3 sets of 18's, i've found that if I find a rim that's not in our bolt pattern, give the manufacturer a call themselves and usually they'll help you out. thats what I did with my current set of rims, 18" Katana T5's and I couldn't be more happy with them or the service I got.
I'd either go that route or go to whalentire.com, I love the ADR wheel line and whalens prices are fantastic.
