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There's a few router recommendations in
this article. Any router you choose, make sure you do go for the g rather than slower b standard. the b standard will not realy be fast enough to support the maximum speeds now available on broadband i.e. 10mbps.
Personnaly I like the Linksys WRT54GS. Of course you need to ensure your PC has a compatible wireles card to take advantage.
This
setup article may also be helpful