Coral reef has great customer service and a great selection of nicer corals. The frag tank is presently a little overrun, but you can occasionally find a decent addition to your tank. I found a nice blue/purple mushroom in there that I did not have before. One is all you need to get 4 in a month...
If you go to Aquarium and have questions, look for Michael -- he is very helpful. I haven't had to ask a lot of questions in a while until yesterady, but I went to Aquarium and spoke with Michael and he gave me some good advice on setting up my freshwater planted tank. Some of the others are helpful, too, but I've had bad experiences with a couple of them. And don't bother asking for special orders. I've had nothing but grief on that. They won't hold items for you unless you pay in advance (wish I would have know that before I waited a couple of months for my bumblebee gobies to come in, got a call that they were there, and went over that afternoon to find them sold).