Been to both Continental Arms and Horst & McCann; by a long shot (pun intended), Horst & McCann is the best. Friendly staff, nice place just to hang out and read a magazine or talk about guns; not so much at Continental.
Regarding Just Guns on Harford Rd; went there only once back in September when I was looking for my first gun; there was some lunatic there behind the counter that talked about 'popping' the president, that there was no sense in getting a Fl Non-Res permit for use in PA, Del, etc because he's an ex-LEO and knows the laws and LEO can still take your weapon, etc. Just thought he was a whacko! Besides, didn't do much to help me in the weapons dept. Saw him last week at the Gun Show in Timonium so he's still with Just Guns. They might be good folks but I just got bad vibes from him.