yeah if youre shooting for like 150hp you can get a exedy stage 1 or an act HDSS clutch and maye a flywheel. that would be a nice, long lasting upgrade.
honeslty though, i had a maxed out bolt on motor (vtec head, IHE, ignition, fuel system, pulleys, clutch, flywheel, intake mainfld, throttle body, programmable exu) and i made about 135 whp (so maybe 155-160 flywheel hp) max. thats where i learned the things that cost me alot of money that did nothign to improve performance.
the biggest value upgrade, is to do a vtec head swap. otherwise, jsut do like we said in the earlier posts.
oh yeah, and like always, make sure your car is in top running shape, like all the general tune up stuff. good compression, timing right, filters in good shape, etc. that stuff will make a big difference