Have power, want more, any suggestions?

A fuel pump upgrade and some new injectors would do you well... those stock trd injectors are probably close to pegged out with your setup. Anyone going forced induction should do a pump upgrade to provide consistent flow. One moment of decreased pressure can mean bad things. Lastly I would really recommend ditching the unichip with something for more tunability without having someone specific do it. I'd recommend the APR X1, the URD UCON, or even the mapecu 3 if money is a little tighter. Having full control over your engine in addition to better injectors and a new fuel pump will allow you to run a smaller pulley for even more boost

Edit: A new y pipe wouldn't hurt either. It is your last restrictive thing going back. Nice thing about an open exhaust system is that you can get more power with less boost