Really depends on what you like to see. I perfer a bunch of smaller/medium colonys with lots of vareity. Or the right mix of larger colonys. For me SPS is just as much about the shapes they take, like turakis, echinatas, vs the shapes with stags, bushy colonys, or tabling acros...etc
If I was to choose just a few I think I'd miss the whole reason I love SPS, the shapes they grow. If you mix them just right it can be stunning. I am not there yet in my tank, but hope that I can get it right one of these days.