Another vote for conduit. One school of thought is to install conduit, run your initial cables outside the conduit and leave the conduit empty for future cables. I say if you are going to install it, you might as well use it for your initial cables as well. I recently had an HDMI cable go bad and if it had been installed beside empty conduit, I would have had to abandon it in place. Since I bought it at Monoprice and they have a lifetime warranty on all cables, I was able to pull the bad cable out of the conduit, ship it off to them and get a free replacement. If it had been stuck in the wall, I would not have been able to get the free replacement.