I'm from Houston, so I've been to many of the marine fish/reef stores there. Hopefully I'll have some time and money to check them out again during Thanksgiving. The store there carry a larger selection of livestock. I used to have a favorite store to go to, but the ownership has changed hand. So.... I haven't been buying much from Houston anymore.

Coral wise, Aquarium World carry the largest amount of corals. Basically Aquarium World use to be Fish Ranch. Fish Ranch used to be the best stores way back in the day. They have several locations. But now there's only one or two Fish Ranch left.

And yes, most of the stores mentioned so far have a website.