You'll want to read this
http://www.cableforum.co.uk/board/article.php?a=12
Personally I would recomment the Linksys WRT54G and linksys wireless cards to match. Others recommend Dlink and Belkin. Just make sure it is a cable broadband router, not an ADSL modem and broadband router. The latter will not work as cable uses different technology to ADSL. A cable based router will have a WAN plug (RJ45-network cable) plug to connect it to the internet. An ADSL one will have a phone jack (RJ11).