Or save yourself the hassle and money and use wireless
Wireless doesn't always work in everyones house/situation. We bought a more powerful wireless/network router in the hope of having wireless in place where it suited us and still we have 2 points where wireless drops out. Darn well wish I'd put a wired point in one of them as on several occasions we've had need of the additional points. Sometimes having wired points as well can be handy.