Recommendations for sleep centers/docs in the Boston area?

Could I get some recommendations from folks who have had good experiences with a particular sleep doctor or sleep center in the Boston area? I'm willing to travel further than that to find someone who can diagnose central sleep apnea (which I believe I have), but for now I'd like to limit things closer to home. I've been to the Lahey clinic, but haven't been very pleased with my treatment there.

Thanks in advance.

-b