Reddy

Yeah but its an H22, put the biggest (reasonable) turbo you can find on it. Trust me you'll be glad you did.

LUDELVR

It's not so much that the entire internals are weak on an h22a, but rather the ringlands. There is a guy on h-t (Firedrake) that is running some good numbers on an h22a1. It's like 379whp on a stock motor running 12.7's. It's all in the tuning, also, I think the closed deck design of the a1 motor also helps out.
Oh yah, and yah, I think a t3 (no matter what trim/size) is gonna be too small. I ran a straight t3, .60 ar and it peaked out WAY too early. Also a buddy of mine ran a straight t3 off of a benz and it barely even felt like there was a turbo.