Is yours the twin turbo model? If so a large turbo upgrade, bigger injectors and a remap are about the only mods you need.
A big single turbo will allow you to hit the power goal more easily, but it will suffer from lag.
It would make sense to get stronger forged engine parts and get the engine blueprinted and balanced.
PS: Sorry for my slow reply, had a whole raft of hospital appointments and really crazy work schedule so haven't been on here much.