I like Seahorse, too. Knowledgeable staff. Its a family operation and they actually "quiz" you before they'll see you livestock, i.e. tank size, time set up, other inhabitants, so that you don't buy something incredibly wrong. I was actually just there this afternoon. i do worry about the small size of the holding tanks, but their turn-over seems pretty good, so maybe I'm just a worry-wart.
Pet Supplies + on McKnight isn't bad either...but livestock and reef items are limited. But for common supplies, they're great!