I like Symantec's Firewall, but to be honest I have not tried Zonealarm 4. Then again I have a Cisco Pix so personal firewalls aren't my thing.
Tiny Personal Firewall and Kerio Personal firewall are my choices. Zonealarm is just too.... Limited.
Smoothwall 1.0, running on a PII MMX, 32mb's ram, 1GB HD. Solid as a rock, and never knowingly breached. The only let down is the lack of outbound protection Failing that, I guess ZoneAlarm will do.
I also use ZoneAlarm Pro. I could use something like Tiny Personal Firewall, but I have 2.8Ghz and 1Gig of DDR425 so I figured I may as well put it to work.
Linksys hardware. By the time software firewall gets to look at the packet, it's already in your system. Zone Alarm is usefull to stop processes from phoning home though.
So do I. I rate Stingray (codename for new version of ISA Server), and the trusty old Cisco PIX. The new firewall in Windows XP SP2 is also much improved (currently in beta). At home I use ZA, but will probably switch to XP's firewall once SP2 live.
Well I have a team of firewalls, I have ZoneAlarm Pro 4.5.538 , Sygate personal Firewall, and a built in firewall runnign for anything basic and useless people. All this makes an insane firewall, anti-trojan, nuke, port scan...well a lot of things.
I seem to remember a fairly good firewall for Windows called Outpost. I haven't used Windows at home in a few years though, and don't know exacly what has become of it.
and theres me using that cr*ppy norton personal 2003. i still get virus alerts all too often. get this.....weekly updates!!! madness...weidness...and much notrightedness