Can't go wrong with the:
Apexi PowerFC D Jetro ~$1800 now with the poor yen + ~500 tune and install.
Greddy PROFEC B ~$550 now with poor yen then ~150 to install, takes very little time.
Button Ceramic Clutch ~700-1200 ~$300-500 install
Keep it under a bar of boost will keep it safe with the ceramic rear's if it is not a VSPEC and expect 300-350hp~ safe with 12.5's~ @ 107-111mph~ which is a awesome street car. If you interested in running alittle quicker other upgrades like turbo's, injectors, fuel pump, manifolds, dumps, cams ect will be needed. You obviously can take shortcuts and push the stock turbo's harder and slap a aggressive tune but it will cost you more in the long run.
Hope that helps.