I have never heard a set of these but have always wanted to as I have heard nothing but good things about them and they never come up for sale local. Although there is a set of the M7s fairly local to me on Ebay but with a starting bid of 500 dollars a little pricey for me. I will keep an eye on the auction to see what happens but with only pictures of one speaker and no details they might not draw much interest. Also does anybody know the difference between the M7 model and M7a?