Des,
 
Just like you, I just received my M2. My first Leica. What a beauty! As far as the shutter noise goes, I did not compare it to my GSN, but I did a non-scientific comparison with the Canonet (also leaf shutter) and found the M2 to be as quiet or perhaps a little quieter (but I might be influenced by the extra $500). I also have a Bessa R3A and I can tell you that those two are worlds apart. Enjoy the camera.
 
What are you using for a light meter? I have a hand held meter, but I am wondering if it would be more convenient to get one of the Cosina Voigtlander shoe mount meters?
 
Cheers.