Which is the Best Firewall in the market?

I hear people differ in their opinion, some say comodo firewall is the best, some say zone alarm is the best. I am at a great confusion to opt on to the security software because i really worried about my PC being hacked by hackers. Can someone provide me the best solution for me.
Whether it is Comodo Firewall or Zonealarm? If it is any one of in the list, please tell me which one I can opt i.e whether the free or the premium version?