I went to North Dallas Aquarium today, and yes they have a good selection, one of the best I have seen in this area. The sails people were a bit pushy, but I am a New York transplant and it did not bother me at all.
Also there was another store across the street from them, Pet Palace, not to bad, but not as much of a selection.
Both are good but a bit too far away for me to do a regular visit. I will however go to them once in a while.
My Search continues... Tomorrow to ABT Tropical
Bob