To be honest dude you are looking at things the wrong way round. Rather than trying to do everything wireless and only wired if you have to, you should want everything wired as much as possible. wired connections are faster than wireless and are far more stable. The only down side is if you pc isnt in the same room as the router.
When you are looking at cables make sure you get a cat5e patch cable. The length and colour are up to you
