I was in the market for an s15 two years ago. Test drove 6 of them, mostly Jap spec ones and a couple of adm s15s which dont have any guts at all. Rubbish. The jap spec s15s go way better. Then I test drove one R34GTT. Fell in love instantly. Bought. So glad I didnt get an s15, I dont like the stereotypical image associated with them and the fact that it looks like a kid's car- very sleek n sexy n hoonish, the skyline is much more masculine, ugly, solid, and brutish and much nicer to drive. Depends what u want, the 34 was my choice and it rocks, would never look at an s15, an EVO yes, GT-Rs a much bigger yes, if only R34GTR prices topple..