How tight is your budget? To get about 350rwhp, i'd suggest you have bigger injectors (550cc or more), reprogram your ecu (JWT or jap ecu), Z32 mafs and thicker headgasket for higher boost and probably an aftermarket intake mani. I might have left something out. Of course, assuming you would have had FMIC, RAS and other basic SR swap parts already. As for which turbo, they both are great. I've seen many with both kinds producing good number. So take your pick. Oh, may i suggest TD06-20G. Good luck.