Beautiful fish. Like others, I have met a few very nasty JDs before.

Definately steer away from SA cichlids & new worlds if you're looking for community fish. They can be aggressive little(well, not always little) guys that like wreaking havoc on some tanks. :]

I've always heard of Angelfish doing better with fish such as Silver Dollars, Tetras, Gourami, etc.. I haven't really heard of many people mixing other cichlids with them.
I currently own a large variety of cichlids. Mainly Africans, but I do have some South Americans & New worlds. Out of everyone, my Africans are the most tolerant of eachother. Labidochromis caeruleus(... I forget what they are called in stores. Yellow labs? Electric labs? Electric yellows? something like that) are the calmest in my african tanks, and probably the only cichlid I'd want to try with an angelfish.

Good luck. Cichlids are, by far, the most interesting fish to own in the hobby. In my opinion, that is.