it'd be pretty expensive to put bigger turbos on. you'd have to get the turbos, all the parts: intercooler, downpipes (two of 'em), etc...and then get a custom tune. and on top of that you'd have to worry about the tranny falling apart on you and there's not really any reasonable options for upgrading the transmission in our cars.
i'd say if you're going for performance, stick with an intake, chip, and a nice turbo-back exhaust. that's where i'm eventually going with my car.
