The Linksys WRT54GL with DD-WRT installed myself has been great.

I am, however, on my second one. I did push the power on the first one within the recommended limits, but I'm not doing that on the second one. I used Visa USA's extended warranty coverage to pay for the 2nd one.

There are other brands that use the same chip and work with DD-WRT also. Any of them would probably be ok.

I believe Scott and others used to recommend Bufalo routers based on the same chip, but they had to stop selling them.

The DD-WRT wiki lists all the supported hardware.

The stability comes from the DD-WRT firmware. Most of the firmware from the manufacturers is crap compared to DD-WRT. (just for stability alone. It also supports a richer feature set, including QoS, etc.)

-David