The GSi is crap, don't waste your money on it. You want the VTiR version or an EK4 Civic VTiR. The EG VTi is ok though - I'd take one over a GSi. The Silvia runs a SR20 and isn't running a turbo. If it's auto, he'll give you a run for your money in a VTi or GSi, but you should be able to get away from him. If it was a real S13 with SR20DET he'd smoke you twice before you hit the finish line in any car you've mentioned so far