My first documented not of the concept of copper gaskets to allow the use of pop top pistons was a power boat engine used in an a 350 cube Chevy engined Capri piloted by a Melbourne guy, Stakov or Stadnic, I think. The Capri did low 10's, and was British Racing Green. Year was 1988, listed in a Street Machine magazine.
Anyway, the engine was ex power boat, where the regs didn't allow risen dome pistons, so the stock block was decked 125 thou, and the pistons were profiled to suit the angled plug fuelie heads. Result was a 12.5:1 compression with stock , formerly flat-top TRW forged pistons. Great idea.
I guess you have to decide on what you want, and don't let anyone pscho-bable you. If you build it right, a copper gasket, even on an alloy head, is the easiest way to drop the CR, and if you have to lift the head, it means there is no remachining required. Long term, over four or five years, the copper tends to be a sacrifical galvanic source, and the alloy tends to get marked and pitted. Sort of like pitching an old 2 cent piece into an alloy row boat.
Enjoy yourself, it'll be a rocket ship!