...for all your feedback. I'll wait on the angels some more, since my other fish seem to be doing well right now. It doesn't look like adding one more small fish would overcrowd my tank (all my fish are getting along right now, but as mentioned, I'm sure that could change once they begin to grow).
As for my UG, I've used it in the past when my tank was first set up, and though it may be primitive, it has worked well for me. I guess I've been lucky