Are you going to start pushing more boost in the near future? I'm sure @ 400hp, you'd be a lot faster with a smaller turbo.
I don't really understand the philosophy behind your statement.
In the near future I plan on upgrading to a 44mm tial wastegate. Therefore, I can run low boost in 1st & 2nd (utilizing the greddy profec B) and step up the boost in 3rd through 5th.