Wouldn't bother mate, if your going to go any bjgger than a td05, go for a garrett dual ball bearing. Check out the power leaderboard, jayep91 ran a td06 at 22psi I think it was, made nothing below like 5000rpm.
thought that would be the answer, lol. was just thinking on differnt turbos. think the turbo il go for is a TD05 20g, but im a long way from that... lol