Recommended Boston area sleep apnea professional

Does anyone have any recommendations for a sleep apnea professional and DME for the eastern Massachusetts area? I have been using Sleep Health Centers, but my impression is that they are much more profit oriented than quality medical care oriented.

I know the Longwood Medical Area hospitals have such services, but I think because of Romneycare most of them are under strict cost containment measures. I've heard that the hospitals owned by Steward Health Care System are particularly bad. The partners ones may be OK.

I would prefer a small, flexible, independent provider.

Any recommendations?