I had 272's on both exhaust and intake with extensive head work. Sounded tough on idle but would hunt like a pig driving around, became something that started to be annoying to "go for a cruise in".
Turbo was a td06-25g base with t78-34d wheels and rear housing (dont ask me why, it came on the car), something like 1.0 - 1.1bar at 3800rpm and 490rwhp on pump at 1.5bar. The guy I sold the car to has had the motor on an engine dyno and made 720hp at the fly at 2bar IIRC with alot more tuning and playing around.
I have no idea if you "have to" run different size's on the intake, I just know althought my car was streetable it was a pain in the ass to drive off boost around town.