I've been in ATL for 25+ years and have heard of...and been to some of the AME's mentioned here. As long as everything with you is OK, a "can he fog up a mirror" medical is great. When you're young and healthy, no sweat.
As you get older, your chance of having a glitch increases. At this point, you'll really need someone locally with a lot of experience dealing with the feds and any other docs who may be involved in treating you. ALPA medical is great and knowledgeable to the extreme, but you need a local advocate....ALPA is in DEN.
I'm not sure how much help your busy, local GP would be when you have a complicated, career-threatening problem. ALPA medical will NOT initiate a call to your local doc...HE/SHE must call ALPA.
My experience has been that local GP's/specialists just don't "get it" that a professional pilot is not like every other patient who walks through the door. And, they tend to get offended when you try to inject what ALPA Medical has told you about how your case should be handled to restore your career ( apparently doctors have egos rivaling those of airline pilots).
The moral to my rambling...get an AME who has the knowledge/experience/understanding/motivation dealing with professional pilots...not some busy GP who knows easy money when he see it.
Just a thought from an old guy who has beenthere/done that.