If you live in or around Houston, Tx Houston Camera Exchange is a great store. The store itself could be better. It's a little cramped and so forth, but they have a great selection and everyone who works there from what I could tell are photographers, so very knowledgeable. The prices are the same or only slightly better than anywhere else, but the service is great. They'll also buy some used camera equipment. Their web address is www.hcehouston.com I'll admit their website is pretty much useless as far as their inventory goes, but they list upcoming photography seminars and classes there.
Christina