Has anyone listened to either of these speakers? If so, what are your opinions, especially negative impressions? The 601 is the smallest speaker in B&W's 600 Series 2 line, and the DS6 is their THX dipole surround speaker from the same line.

I'm thinking of using the DS6 dipoles as L & R surrounds (surprise :), and a pair of 601s as "ES/EX" rear surrounds.

The tech specs look good for both, and I can get them for what I consider a good price. My problem is that I've been unable to audition them in a decent listening environment, and the store with the good prices charges a restocking fee for returned merchandise. So, I thought I'd solicit some experiences before deciding to take the chance.

Thanks for your opinions! -Bruce