I have the z5000's in 18 x 7.5, but I don't know the offset - I never looked. I got them from Wheelmax and they did me right. I have Tokico blues and H&R Sports and I DO NOT RUB EVER !
They weren't really cheap, but I think they're worth it. Good quality and cheaper than the SSR's I wanted.
Oh, the rubber - 215/35/18 Falken FK-451 Grb. I have to say, excellent tire ! I've had no problems at all with grip and they seem to be wearing very well (although they're off for the winter).
Very good performance. Pirelli's are nice too - I just wanted to try something that not a lot of people had, hence the Falkens. Don't be fooled by price...
-Chris