I can repeat what Underdog said - that I've heard good things about Pan Aqua and Empire, but have no personal experience.
I have two problems with Pan Aqua. I want to buy where I get training, and I don't like what Pan Aqua sells, (e.g., Henderson wetsuits, fancy shmancy BCDs). I also think their travel trips are overpriced, I mean more so than trips by other shops. Oh yeah.
I also got bad equipment advice from them on two different occasions. On one occassion the sales person dissed a mask they didn't have (the new Atomic).
I know it's a hike, but the only shop I get a warm and fuzzy about is Scuba Network in Carle Place.