Where can I audition amps near Boston?

Hey all -

I'm planning to upgrade the power amp in my system in the next few months.  Brands I'm interested in are Bel Canto, McIntosh, and Quicksilver.

Does anyone know anyplace near Boston that carries any or all of these brands?  "Near Boston" for my purposes could include Rhode Island, eastern Connecticut, and southern New Hampshire.

I would love to be able to hear before I buy.

Thank you so much!