if you think....
if you think ZoneAlarm is too buggy, it sounds like you haven't tried recent versions...which are very stable and bug free. I am glad to hear that you have no problems with BID...accept for the fact that if you did have a trojan that your A/V didn't catch, it would be calling home and you wouldn't know you had a problem, because BID does NOT watch/protect for outbound...only inbound...
I know BID has recently tried to claim that they did protect vs outbound, but their claims were already proven false in testing. So, while BID may give you no problems...it is also only giving you half the protection a proper firewall should.....