i'd go for the following:
Netgear WGT624 108Mbps Wireless Firewall Router (NW-021-NG)
Price: £51.95 (£61.04 Including VAT at 17.5%)
It's a cable modem with a 4 LAN ports, and wireless access. it's also got a firewall too, which is a nice feature. I'm not sure how secure it's firewall is, but it'll be good enough for home usage.
I've had some good times with netgear stuff. I have a Netgear GS608 8-Port Gigabit Desktop Switch, and Netgear WG602v3 54Mbps Access Point.