A friend of mine has Rota P54Rs on his 240SX, and they fit good. They're 18x9.5 +12 offset. I think they're one of the few rims Rota makes that come in decent sizes. IMO don't worry about wheel weight unless you seriously autocross or track your car. However, from what I've heard, Rota rims have terrible QC...they crack under heavy stress. Where's that infamous picture...oh yes.
If you're really worried about wheel weight and don't want to spend a fortune, get a set of Enkei RPF1s. They look great on RX-7s.
Hey proz07, are you implying that you can find knock-off VS-XX rims for less than a grand? if so let me know where, I might like a set to use for drift rims...