piston help!!!

here the deal, i'm rebuilding my 2000 si, i bought a b16a block (not sure what year) and sent it golden eagle to have it sleeved with a 84mm, i'm having it line bored and oringed, i bought a new eagle crank and rods (stock deminsions). my ? is what piston do i go with, i was thinking je but i've heard there's a lot of prep work and cylinder slap, i'm leaning to cp now but dont know much about them, a friend is running cp's in his 94 sc2 (dohc saturn) and making 329 whp and loves them, i've been looking online and nobody says anything bad, but nobody else has used them, my goal is to put down 500+ whp. any help or advised would be great, thanks

je, eagle, arias are all proven. figure what comp you want to run. start from there.

9.2:1 c/r, going to have them cyro treated and balanced with crank rods and flywheel, not saying je hasn't proven themselfs, just heard some bad thangs lately.