SLC stores are as good as they come.
I know of ATM and Green Valley in Vegas.
You could stop at Living Art Aquarium in St. George. It's right off of I-15. Tracy and Wendi, the owners are from Park City, used to be regular on this MB and it was their Bangaii Cardinals that are the Great Grandparents of many currently living in WMAS members tanks.
Feel free to give me a call and stop to see my tanks I'm right off of I-15 too, work at home so am almost always here, playing with my aquariums.