Best store IMO is Cichlids & Salt in springfield. Sean is a member here. Great prices, and good looking stuff.
www.cichlidsandsalt.com is his site.
Aqua Serene has an awesome setup, but they keep their corals that aren't for show in lowlight tanks so they never look very good. Lots of fish and dry goods, prices are pretty steep though. They are on W 11th.
Pet Time is another pretty good shop. Has more fish than reef items though. Corals never really look to good to pass up. Price is decent, not as good as Sean's. On W 11th a few blocks from aqua serene.
HTH
Miles