Lots of good routers on the market today. I like to recommend major brands that seem to have fairly easy setup instructions and have easy to find firmware updates and FAQ pages on their websites. I work with Linksys the most. I also like D-Link and Netgear.

Take your pick:
Wireless-g (54Mbps) broadband routers get the job done.
Wireless-g MIMO (or Pre-n) routers have much greater range and speed, but cost more.

There is an enhanced wirless-g router category ( > 54Mbps < MIMO) that is faster than regular 54Mbps wireless-g, but I would get MIMO for the better speed and range jump. The enhanced wireless-g benefit usualy is only realized when very close to the router (less than 10 feet). It sometimes goes by the name Afterburner or SpeedBooster.