in other words I will be the Guinea pig if you like, and will try them, and will tell you later on what my thoughts are, they are returnable, all you loose is the shipping cost, not cheap, but IMO a fair price for a tryout I think...
I was just going to suggest you have nothing to loose as av123 is pretty good about returns.
I do get they are supposed to add to the ambiance of the sound but is it worth the $350, not to me.
Just a suggestion, try running some test tones through the M80s, with an SPL meter just to see where they drop off in your room, the graph could just be an anomaly inside the chamber, it does look like the graph is starting to go back up just before the 20khz mark and even though it is dropping off substantially it could still be heard as it doesn't go to 0 just down 10db, which isn't good but still audible, sort of.
