My two neighborhood stores are SeaWorld and AquaAddicts (both in Salem, NH).
Personally, I've not found the coral selection at SeaWorld to be very impressive, and sometimes not all that healthy either. They have nice fish, and lots of them, but again, not quite the variety or health of AA.
Skiptons is a real spectacle. And when I can get all the way down to the other end of the state, CRA in . . . Seekonk, I think? is one of my favorites.
Lots of great stores to choose from! Great Reefing city!