Preuss Pets in Lansing Michigan has been great to me thus far. I completely trust the quality of the fish sold there. They seem to be able to order anything. Prices are slightly higher than chains like PetSmart, but the peace of mind knowing everything is properly cared for without diseases is worth it to me.
As far as ornaments are concerned I'd consider somewhere else as their selection isn't huge, but large enough to suit my needs.
Both freshwater and saltwater species are kept along with a few tanks dedicated to Brackish.
Also deals with reptiles and birds. (I always walk straight to the fish though
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