Firewall Suggestions

I was just interested in knowing what firewalls some of you have used, and would suggest. I recently downloaded Online Armor, which seamed to have some pretty good reviews.
I'm not so much interested in ease of use as I am in powerful protection from intrusions. I want something that can protect me from deliberate invasions of my computer, not just from website crap. If anyone has any input let me know thankyou.

 

Well, you already have my suggestion, Online Armor. It's more than just a firewall and offers protection on several levels. Comodo's free firewall is great too.
Comodo Personal Firewall http://www.majorgeeks.com/Comodo_Personal_Firewall_d5033.html

 

Thanks, from what I read Online Armor seamed to be pretty popular, I think I'll just stick with that.