Yeah I like the idea of having a variety of species in the tank. I really like frontosa's, but from what I have been told and read they really should be kept alone as a colony - so that is one negative.
Clownknife - are you saying those are species that would do well with frontosas or is that a list of Tangs that do well together? I would love to keep some frontosas, but again I would like a variety of species. So if they really should be kept alone then I probably won't go that route.
With that, I think I am leaning toward a predatory hap tank or a community Tang tank. If someday I can have a fishroom (or a third tank large enough) I will probably do a frontosa colony.
Robulus - I like your list of haps. At least some of those are already on my potential wish list either for my "new" tank, or the old one when I restock it after the move.
Somebody on another forum said I should look into eartheater cichlids (Geophagus altifrons or steindachneri). They looked interesting, but I don't know anything about them. I have looked into them a bit and they are gorgeous fish. Does anybody know anything about them (I know this is probably the wrong part of the forum to ask about them)?