The only two in the Triad right now are Reef Critters and Reef Architects. I typically go to Reef Critters, they are really nice and have a good selection of fresh and saltwater livestock and dry goods.
+1 to Triad Reef Critters. They quarantine their in coming fish. Treat them as well and then make sure they are eating before putting them in the "For Sale" tanks. They may be a tad more expensive than the other one around on certain things but the quality of the livestock is more than worth the extra care they put into the fish and coral.
Both are great shops and ran very well. I have talked with the owner of Reef Architects and his process on how he introduces new fish and how he keeps them is meticulous. He does a great job. Triad Reef Critters is a good shop as well.