if your goin to buy an enigne anyway just get a 26, more usable power for less money then moding a 20 or 25, with a couple of bolton mods i've got 290rwkw in the 32 and it is very easy to drive every day with great midrange(full boost at 2800rpm, noticable boost at 2000rpm), then ya put ya foot into it and all hell brakes loose.
stock motor with cam gears, full exhuast and 15psi on the factory comp it made 215rwkw, add just a boost controller turn up to 18psi and it did 231rwkw and ran 11.9 at 115mph in a full wieght GTR with a dodgy cat
change cat add pfc coils, plugs and z32 AMFs and 290rwkw and 11.36 at 125mph still full wieght