i dunno about 25 whp, maybe 15, and thats a stretch. If you go all motor, go with the itr or ctr (preferably the ctrs) simply because they, well, kick ass. Teyre cheaper than aftermarkets and they beat up on all other cams in low-mid and often high hp. If they do get beaten (which they often do) its not in a race, its in the last 1000 rpm on a dyno. Go turbo if you want to stomp the comp man. Its not always the most freindly around town and your engine may die faster but thats only if you dont take the necessary precautions.
peace