I'd tend to want to run a CAT5 from the current router/modem to the other end of the house and put a small hub at that end,
More than ever it's worth thinking about having a "central" area in the home for connected kit - just looking around here, for example, three TVS, all ethernet - Blueray, Sky HD, laptop (wifi unless heavy file shifting then port), desktop, NAS, another laptop, printer, planned bluray in bedroom, poss second HD Sky box - linux media server, DVR for CCTV, test ports for kit coming in and testing, = around the house that's 14 ports, not counting Wifi accessed devices, such as 4 smart phones, another printer, IPod, IPad, folk coming over with their phones, ipads/pods and so on - it isn't uncommon for upward of 30 network devices in this house.
For that reason - I made a qualified decision to install a 24 port managed (PoE) switch in the loft, run the CAT5's and put proper network plates in for the devices, plus for quality, I have the Wifi on the main router - which is connected to a repeater downstairs - for signal strength mostly - we have a lot of wifi networks locally. Not the cheapest way to do it, but I can guarantee maximum possible bandwidth at any point in the house - until the broadband dies, that is......
Wired ports are gigabit all the way (essential now if streaming Hi Def media - and you have other overhead on the network too)....