Yes you are correct, I should have said several members and not several threads - and even then, not all the members that mentioned the hiss considered it much of a problem or design defect. Looking again, I really only see two threads that talk about this at any length:

http://ubb.outlawaudio.com/ubb/ultimatebb.php?ubb=get_topic;f=10;t=000044#000007

http://ubb.outlawaudio.com/ubb/ultimatebb.php?ubb=get_topic;f=18;t=000127#000000

The first thread listed above was the one that really got me worried. Those comments there from alzy101 actually stopped me from buying the M200's, well at least so far.

Does anybody have any idea at all why the M200's caused such a significant hiss problem in that system, whereas the 755 in the exact same system would not have any hiss issues at all? Very curious about that...