Try the Kosei K1. Popular wheel with the BMW clubbers. Light, cheap and looks good on the car. I've got them in a 15x7" size and they fit just right. I got mine from Jack at Elephant Motorsport. He might still have some.
I'm also a REALLY big fan of the 15" euro-basketweave, but they seem hard to find. I may have to send a friend on a mission to find me a set when he's in Germany. Several people here and on e30tech have them though. If you can find a set for a decent price, this is probably the best option for a street wheel IMHO.