I keep our boat @ Port Annapolis on Back Creek. They're service department has always been good to me and they're expanding their services. I also used and was very happy with Diversified Marine Services who fixed delimitation in my cockpit and refurbished the binnacle. The paint job they did on that was great with the exception of a little paint running on one of the instrument pods which they gladly re-painted for free.
Casa Rio is in Mayo which is south of Annapolis on the Rhode River. They have a guy that does all their painting who does BEAUTIFUL work. I've never had it done but this is where we haul out every year and I frequently walk by his work and am floored by how how great it looks. Another advantage is that this marina allows DIY work so you can get other stuff done while you're there for the paint job.