I would always go wired

I have found that games are not bad over wifi, but Netflix blows over wifi. If you want to watch anything in HD it will buffer or cut back on your resolution. That has been my findings. The other alternative is running it external out of your house, and tuck it under your siding

if I have time next weekend I can do that for you. I would find a router and do as Dagger did before buying a wireless unit for your xbox just in case you go the wireless route.