Bad way to think about it - you are branching out, not leveling up. I assume you have pulsing Xenia, Kenya trees, gsp, zoas and Duncans. Do you like them? Xenia, Kenya tree and GSP probably need to go, or they will take over.
Lots of people have a 'zoas' focus tank. If that's what you want, other varieties are probably not harder to keep, just more expensive.
Do you want Acropora? Do you want them to be the focus of your tank? If so, you should get your lighting and flow where it needs to be. If not, a few hardier Acros might still work.
If it isn't going to be an Acropora tank, you probably want to find LPS you like. Lots of LPS adapt to a variety of PAR, but I'd get an idea whether you want a high light tank, low light, or in the middle.