Thanks for the reply, Faythee. I'm currently debating between rams and apistos. The store where I bought the angels had what they called "blue head agazzi", which, from what I can tell, is a. borelli. They were next to the juvenile blue dempseys and some had jumped over into the tank and, without really looking, I almost could tell the difference. They were very attractive fish.
What probably makes the decision a little easier is the fact that good-looking rams are hard to come by around here (as are pretty much any good fish). I rarely see those with bold colors and the black markings, which are hard to compete with in terms of beauty. What I typicallly come across are washed-out, pale, and have no black coloration at all.
I'm finding myself coming up a little short on top, however. I've got the apistos or rams for the bottom, cardinal tetras for mid-bottom (harlequin rasboras if the angels acquire an appetite for tetra), angels for the middle to mid-top, little-girl-bettas for all over, but nothing for top-top. Hatchetfish seem a bit bland, rainbows, in general, seem a bit neurotic and don't seems to stay too near the top, and to leave it empty seems a bit out of balance. Congo Tetras seem like a reasonably good choice, but I'm not sure how they behave. Do you have any suggestions?