It's overpriced and there are cheaper options, but I've been using an Airport Extreme for years and now also an Airport Express. Replaced a Netgear that kept dropping the wireless signal. The Extreme has been completely reliable for years, and this Express has made it possible to work at places without wifi such as my family's house or client conference rooms.
I choose these because my time is better spent coding than experimenting or supporting a router. Otherwise, I think something that runs Tomato (or similar) for much less money would be nice.
$0.02
-j