Hey Aureous,
Like you I have been looking for noise canceling headphones to suit the 6000..
I have a set of Sony which were FANTASTIC on the Zed but not suitable with the 6000 because of the delay.. Not so much in detecting the target in the ground going low and slow, but in recovering from the scoop, throwing out the contents of the scoop before the signal comes through and having to start over again….
Still looking, so watching this post with interest.