I like this thread
S15's also have a weak 6speed so you'd have to swap it for a s14a ( facelift) 5 speeder as the 6s dont like being driven hard when they've done 150thou kms, that seems to be the only fault with them and after-market gear is easily attainable for them and lots of spares for them too!. And i know what your saying about the rotor boys, my first turbocharged ride was a series 5 RX7 and if your not wearing a NewEra cap, celtics/magic/bulls/heat singlet, nikes and cut off denim shorts and have a tattoo on your forearm you were made to feel like you werent meant to own one.
im currently searching for a pic of my uncles old r34 gtt, 132kms when he brought it, just had an HKS hard-pipe intake, wank valve and after-market front pipe and 3inch exhaust.... it was big and heavy plenty of torque for rolling burnouts on the motorway, but lacked the 'peppiness' of cars of smaller displacement, and for a newish car by boyracer standards, it got walked on by a few cars my mrs and I own/owned.
are you going for a balls out drivers car? japanese decent? have you considered something a little more classy that still has balls? maybe an aristo or soarer if you go toyota? luce or cosmo if you go wankel ? g35 fairlady or 350Z if you want to go nissan? they are all fast as far as jap tourers go and you get all the dope creature comforts too!
personally id go supra with the 6speed getrag box, purebreed true rwd sports car. need for speed road and track was my first time seeing a supra! loved them ever since...