first of ~~~ I think a turbo upgrade would be a better option there are better real gains to be had there. and intercoolers ecu etc
before you go for cam or is your car already modded.
you cna also use the cams from the rb26 or you cna get special cams from apexi that work with vvt. wait a bit fo rthe cams btw what did he quote you to do them and how much power did he say you would get. and cheap cma thing wiould be to have an adjustable cam gear fitted and to have it tuned not sure which one they do in the rb25 but that would find you around 5-10 rwkw
meggala
btw on my web page I have written a few thing on mods in the modification section its not finishes but it might help.