If you're going to do both wrasses and tangs, I'd add a cleaner wrasse to the list. The wrasses eat inverts, so ya can't have shrimp or crabs, but the tangs are prone to ich. A cleaner wrasse will do the same job as a cleaner shrimp would, and that'll keep your tangs happy. If you get the coral beauty, keep a fish trap handy- there's a 50-50 chance it'll nosh on the corals. Mine liked softies, but I've heard plenty of stories from others that theirs never touched anything. (and yes, I fed it plenty. Probably too much- decent size chunk of frozen food twice a day.)