Agree w/ Denwood on the WAP.
I'm doing something similar inside the house. In my case, I originally preferred a hard wired connection for all my media devices (Xbox, Bluray, DirecTV, etc). The simple solution was to drop a new line down the wall. I tried that. Problem was I had cross bracing between the studs. That combined with french vault ceilings and consequently high walls resulted in a mess. Had a couple of companies decline to even try the job. One electrician said he could get it but it was more $$ than I wanted to spend.
Alternatively, I picked up an Apple Airport express and set it up as a WAP. I now run an ethernet connection to a Netgear switch and run ethernet cables to my various devices.
I caught the Apple device on sale - around $80 as I recall. I already had the switch from a previous install when I lived elsewhere and could drop a hard line, but that was about $30.
By default the Apple device will run as a router but like most Apple products, it's easy to swap to a WAP. Now when I need to reset my router, etc. it's not a hassle.
One of my concerns with doing any wireless to my media devices was speed, as I occasionally game online and stream 1080p movies. For giggles, I decided to test the speed wireless vs wired. No super science involved. I used an ethernet cable to connect my Macbook directly at the router, turned off my wireless and did a speed test. I then moved the same Macbook to the Apple Airport Express and did the same thing.
The speeds were slightly less, but very minute -- about 95%+ of the original. At the time of testing that meant about 15mb/sec at the WAP I created which is more than sufficient. Since then Cox gave me a free speed bump and I also upgraded to a higher speed plan as well (as I was beginning to hit the max GB limits per month -- due to 1080p streaming I think).
Anyhow, that is probably more than you needed or wanted to know -- but it works well for me. I was pretty doubtful going in this way as in my mind it was inferior. As it turns out I really like it and would prefer to connect this way as there is more flexibility.
