I agree with the ZoneAlarm comment. It's good for people that want a less "chatty" firewall. It's pro version seems to work good for my on my laptop. Makes it easy for me to switch wifi networks all the time.
I have been using both, Comodo and Outpost on Win7 x64 and IMO comodo is lighter, faster, and the hips is much better but have more popups than outpost. Anyway in a few weeks we will have Comodo V4 (less popups) and if everything works like they promise Comodo will be IMO the best security product althoght the AV will be quite normal.