Always go for wired networks.
Wireless technology is only half-duplex, this is means it can not send and receive data at the same time.
Even with wireless N using MIMO.
Wireless is fine for surfing the net, but if you have PS3's, xbox or wanting to stream video etc always go for a wired network.
If you only want 2 extra points, why not buy long patch leads and plug them into your router & the other end into your device.
Not proper way to do it, but ok for the home use & will save you a lot of time if you never done it before.
Just make sure you use good quallity cat5E or cat6 cable and not copper clad aluminium (CCA) cheap s**t that gets sold on ebay or even some wholesalers sell.
Oh yea were abouts are u in wales mate, Im in North Wales. If your not far I could help u out