I recently went from a Netgear 834B to a Linksys WRT610N, and I couldn't be happier.
I used to have to power cycle the Netgear weekly, but I haven't had to power cycle the Linksys once since I installed it a few months ago.
Plus, noone nearby my house uses the 5Ghz band (2.4 is chock full), so I have no problems with interference.
I know it's a bit more than the $100 you set, but I think it's well worth the money (More future proof too).
The only thing is that it runs pretty hot, and Ii built a little stand off to get more airflow underneath it.
This review from Toms Hardware really helped me out in nailing down which router I wanted:
http://www.tomshardware.com/reviews/...oint,2605.html