The usual recommendation around here is the Linksys WRT54GL:
http://www.newegg.com/Product/Produc...82E16833124190
The Linksys routers are usually very solid. I personally use an Airlink101 AR670W that I got for $15 on Black Friday.
http://www.airlink101.com/products/ar670w.php
I usually tend to pick up cheap routers and just replace them every year or couple of years rather than spend the money on a "good" router, though before the Airlink I did use a Linksys WRT54GS for about a year.