Everything QuiltE said, is right on the money. Just like your car mechanic or your own doctor, it's far better to stick with one and develop the relationship than to hop all over the place starting over every time.
Where are you in New England? If you're in Darien (CT) and the "most reliable" Bernina dealer in New England is located in Caribou (ME), I strongly doubt you'll be wanting to trek up there for a tune-up.
ETA: Never mind, I found your location in a previous message. I can't help with a dealer for you; I'm in central NH.
Last edited by ghostrider; 04-04-2015 at 01:51 PM.