Being a manual you have a few other options, pretty much all options for 34GTT will work, if it was auto then Nistune is really the only option that will work with the auto box.
Nistune boards are about $250 if you don't want the software aswell, carton of piss for an electronics dude to install it in your stock ECU then a few hundred bucks for a tune.
Stock injectors should be good for ~230rwkw, any more then you need to look for bigger, injectors for Neo engines aren't super common either. I'm about to commence looking into highflowing the stockers before my Nistune board arrives.. spent big on aftermarket injectors for the 32 twice and there's no way in hell I'm doing that again.