E58 400 plus HP Dart sport build

Little stuck on piston choice I dont want a hyperkinetic piston now. Builders really hate on them for breaking and I'm concerned as they were pretty vocal and it was multiple folks. I know a lot here use them but I'm going to error on caution regarding my kb107 and not buy. I need a stock weight piston forged if possible flattop valve relief. The ones I have seen look like I will have to rebalance and do a new converter and such for the combo. It's also about the fact it's my motor and I want to do it my way my choices if that makes any sense. Any suggestions on the piston choice still waiting to hear back on overbore and how much I may have to go.