Well, I don't pretend to be an expert on this, but everything looks pretty good to me. The surrounds are in a good position, slightly behind the listening area. You might want to scoot the M60s a little more forward (if possible) to get the drivers a little more in front of the adjoining bookcases, and to give the rear-firing ports a little more space. Many people recommend having the sub near the listening area, as you have it, so that's good. All in all, it looks real nice.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton