Also, wifi is all very well, but....
if I had a quid for everyone that complained to me that their broadband is slow and "Virgin/Sky/Talktalk/whoever said I'm getting eleventyhundred megabytes" when using 802.11g wifi (max 56 megabits if router on top of a telegraph pole in the middle of an empty field) I'd have enough for a darn good weekend away...…
If you want speed, use wires. (or fibre, although never seen that inside a house. Yet).