2JZ

Ok, not going to balls out on the whole 'big hp' thing. But after much contemplation on my next build, I've decided on a 2jz s13. I've been pretty deadset on a s13 for a while now, but the lack of availability the past month or two for a decent s13 is pretty rare.

ANYWHO, i'm leaning more towards building the motor first. I plan on forged internals, built head, 'superlegit' bolt ons($$$), singled, etc etc.

But here's where i need a little help. My goal is 600whp.
What turbo setup would provide the most response? Should I run a twin setup instead? I plan on running 93 oct, so yah. Any positive criticism/links to applicable information will be appreciated.