I believe you're somewhat limited in piston choice by the stock cylinder sleeves. They're made of a material called FRM (fiber reinforced metal). The metal in this case being aluminum. H-series pistons have some kind of an iron coating on them to be compatible with the sleeves. The FRM material is not compatible with standard aftermarket forged aluminum pistons. The long and short of it is that you have to resleeve an H22 to run any sort of aluminum pistons.

However, that doesn't mean that the pistons are necessarily the failing point of the engine. Honda pistons are made out of cast hypereutectic aluminum which is the same material which plenty of turbo cars use and I don't think turning up the boost is going to blow up a piston.

If you want to make the engine more beefy I would probably run some kind of forged rods with stock pistons, and a thicker head gasket to bring the compession ratio down a tad. The thicker gasket would require adjustable cam gears, which are a good idea anyway on a turbocharged VTEC engine.