Well i thought i'd start up a new thread on the 'buzz' issue. That other one was getting cluttered and completely got away from the topic of the original post.
I sat down with the M60s again myself this morning with a clear head to listen one more time, then i called customer service. I talked with Joe today and tried to give him a listen over the phone.
Joe suggested swapping the left and right speakers to help diagnose whether the buzz sound was an issue with the woofers or the source material (a great and simple idea).
Unfortunately the buzz still remained while trying all 3 songs with the speakers switched. I isolated the buzz to 2 of the 6 inch woofers (bottom of one speaker and middle of the 2nd speaker).
So Joe is sending me out 2 replacement woofers today and we'll see what happens.
"Those who preach the myths of audio are ignorant of truth. Research begets reality."