I too agrre with Avi. I love Comodo's Firewall but don't have to much faith in their AV. it doesnt have the greatest reviews for detection and its False positives.. i would recommend keeping either Kav or there are a few others that could be better than Kav,, but since question was what FW with Kav,, id say do the Kav + Comodo, Online Armor, or Outpost... possibly in that order.. unless you can get one of the promo keys for OA that has been going around for OA ++ Premium for 1yr, then id use that over Comodo possibly..

Zug