Jichael Mustice

I have a voodoo II turbo kit on my 94 running at 7psi. I have a fuel pump out of an R35 gtr and have a new fuel filter, but still when I hit 5800-6100 rpm it starts to go lean and knock at higher rpms. I am giving up on the stock ecu so I am wondering what is the best ecu (AEM or Megasquirt)? I also want to know everything that I will need to buy when switching over to bigger injectors and a new ecu.