KW V3's get my vote, I've also run Tein Super Streets and they were also good but in my experience lean more towards a comfortable ride then the V3's which are more performance oriented.
However the lack of camber tops with the V3's is annoying, you have to buy aftermarket to really complete them as they lack adjustability with certain wheel and tire combos otherwise.
I recently heard of Ohlin DFV's being developed for SW20's and they could be awesome!