If we're talking about the same thing, I picked up an On-Wall PVC Channel from Home Depot over the weekend. Manufacturer is Wiremold. It's flat and a bit more than an inch wide. Five foot length, lightweight and is paintable. Attach with screws to hold it in place. It is certainly preferable to dangling wires. I think it was $7.00.

I haven't used it because the shelf arrangement for the QS8s appears to work well and the wires run up the corner and they aren't very visible.

I got the idea when I saw a set up using this type of channel in the picture section here on the site.