there have been a few very well made points that should steer you in the right direction. i tend to think that a hone and some stock rings and stock pistons will be fine, but its your tune and turbo system itself that need attention. When i look at the size of those little fellas and then hear 14 psi it just HAS to equal heat. detonation is nobody's friend.

for example the bloke who built my CA is a cylinder head specialist and engine builder. The first motor he ever built and still has is a STANDARD gemini motor bored out to accept VL turbo CAST (non forged) pistons. He runs a massive turbo (800hp roller), 38 psi (in the turbo's efficiency range, not producing undue heat) and nitrous oxide (as its an auto) and runs 10.5 quarter mile times. how?

its tuned properly (microtech)

the turbo flows massive amounts of air, but still produces it efficiently enough for a front mount intercooler to keep in check

it has enough fuel.

topgear has proven that with a well tuned setup, forged pistons fancy rings and decompression theories are all out the window as long as you don't overrun your turbo(s) and your motor is not detonating. a freshen up will be sufficient, investing in a more tunable ECU and sorting out your turbo's proper efficiency range will be your key to boosting bliss