responses will be subjective, based on individual experience, so u might get some varied views.
Many ppl say Norton is a resource hog, for example, and not particularly popular for the same reason.
I've has AVG but, like many, had problems with it. I switched to Avast.
In any case, I would not pay for anti-v or firewall. I'd go with the usual strong recommendations of Avast Free and Comodo, also free.