Yay for you!
I think that's the ticket.
Aesthetically, unless you're going to run two center channels at some point (one above and one below the screen), I'd be tempted to just make the lower cabinets consistent all the way across.
But I think your latest design (and the sub positioning accommodation) provides much improved acoustic possibilities, in addition to future flexibility. Have you considered the Mansfield Beech with tan grilles? I think that combination would look very elegant, and help the speakers to be less imposing. Just a thought.
Maybe some nice pieces of art glass between the mains and the TV cabinet?
Are you going to mount an IR receiver/repeater somewhere? How about cooling for the components in the cabinet?
Man, you've got me hungry for pictures of this thing when it gets done. It's going to be fantastic.
