What is a good firewall?

[Dudelive]

What is a good software firewall? One that will not be a resource hog, right now I am using Kerio personal and it is sorta of ticking me off.

So which one would be good for alerting of out bound traffic as well as inbound in case something gets on the system and tries to call out.

I used zone alarm since version 1.0 and with XP it don't want to work all the time without locking up. I have not tried the latest version and don't really want all that much bloat in a firewall.

Thanks
Dudelive