Hi!
I am outside of SA as well and just finished my tour of San Antonio sponsor stores.
I think what store will be the best fit is going to depend on what you are looking for.

I enjoyed Gabe's store very much. He has a lot of the dry goods I want (Salifert Test Kits and Tropic Marin Salt, etc.) so I foresee I will have to send my husband over there (he works 'in town' at Lackland) on occasion... ;) Gabe's very nice. Corals look great. Store is very orderly, etc. Oh and Gabe gives an awesome MAAST Member discount!

Aquarium Designs always have odd stuff I am looking for (including some specialty frozen food, etc. and very nice livestock) and they have very nice customer service as well.

Ed with EdAquatics is a really nice guy too and seems to be the guy that can get you stuff when it comes to out of the ordinary livestock. Call before you go though!

Of course Reefs2U is closest to us (Rolling Oaks Mall area) so you can go there often and I got a beautiful clam from there. I really like their clam tank.

Phenomenal Aquatics didn't have much livestock when I went but they did have a lot of very affordable liverock - and a Lego table for kids!

Alamo Aquatics has been around for a long time. I bought my first skimmer there 10 years ago I think. Good Selection too.