If you've already got a nic, get a router/modem all-in-one. How about this 4-port version from e-buyer.com? - http://www.ebuyer.com/customer/produ...duct_uid=48449
Yep, all for less than £40 - not bad. I have one - conexant chipset, and very straightforward to set up. Dabs do an almost identical one for a little more, but the e-buyer one looks nicer
If you ever have another pc, you can just network them together, too - very nice.