I have no miracle solutions.
But, depending on the room, wires can be reasonably hidden by running them unobtrusively along the baseboard and then painting them. Then, if you have a few carpentry skills, you can cut a couple of holes in your drywall and run a fishing line up through the hole so that there are no wires on the wall. A quick patch job and you'll be in business.
In a pinch, I also recommend the flat wire. I used it in an apartment where I had four surrounds in the back of the room. Once installed, the flat wire is virtually undetectable. Axiom flat wire is exceptional, but also a bit expensive. I would never intentionally undercut Axiom, but other companies also sell flat wire for a bit cheaper, but I can't vouch for the quality of those products.
