Where to go from here?

You could make the money on those pistons, as stated, to help costs with the hypers.

Another thought would be some Cometic head gaskets, made to your spec for about $100. Maybe drop comp, ratio without changing quench and use parts you have now.

On a budget, I'd look at what a set of those forged pistons would go for 2nd hand, before paying to have them trimmed, if I were going to use those pistons, I'd go with a different head gasket at about .060" compressed thickness from Cometic. They are reusable and are high quality, to boot.

If it were my engine, on the street, I'd go with 10.5:1 KB hypers and sell the forged set.

The forged rods you have in there will be perfectly fine. You could resize them with new studs and nuts for cheap and do just fine with the KBs. Those TRW's will probably need some balance work with the crank and rods, which is more $, but it depends on what's already been done.

If what you have is balanced, some Cometics may be the cheaper route, but if not, if these are just on the shelf and you haven't set them up on those rods and crank, it may actually be cheaper for you to run the KB's, because of the balancing that would likely need done on the forged TRW pistons.

I'd go with the KB's, because it's a street engine and it will be nicer on the block in the long run.