I had the same predicament as you. I have got TV's, bluray players, sky boxes etc it different rooms around the house plus pc's etc. In each room I have got a 4 port or 8 port switch for the wired devices to connect to and the switch then connects to a router which serves as a wireless access point for the tablets, laptops and phones. As your network grows so does the demand and load so you need to start as you mean to go on and buy proper stuff from the get go. All my routers and switches are Linksys/Cisco. They cost a bit more but they get the job done and I NEVER have any problems streaming content from my NAS' or anything else. My shub is modem mode fyi, probably the most important thing to do if you want everything to work from the start. I have a network diagram somewhere: