I've got the M1 MkII's, and so have a few friends. I agree with what an earlier poster said, they CAN sound far too basy, but if they are set up right, far enough away from a wall and angled properly, I think they give a good response. A mate I used to live with had Genelecs and another housemate had Tannoy's, set up right they were all much of a muchness.

You can get the M1's on ebay for a ton now too.