ok, i have a built smallport, with ae111 ITB's, 272 cams, hi-comp pistons, fully balanced etc.
because i have done a fair bit myself and work done by very good mates it was a lot cheaper (in fact it cost the same as the recondition and mild work i had done originally at reputable engine builder). it will make 100kw possibly a little bit more than that when tuned, no problem.
i know ant kellam has got 100rwkw from a internally standard silvertop engine, with some cams and decent zorst.
so a internally standard blacktop will make the power you want. if you build the blacktop it will not be cheap. do not expect much change from about $7-8k.
advantage of building the motors is, its a brand new motor, with oversized pistons and hi-comp you get a much better torque spread, you will also get a much larger power band IE 3000-9000rpm usually.
what do you want to do? track warrior? george st crusier? touge champion? drift car?
once you know what you want, it will make it much easier to work out what you want to do with your engine.
its no good have a major N/A engine and some chopped king springs, and fucked up supension..