I am using Avast in one of my system. I am testing AVG 7.5 in other one. Rightnow the Avast edition is 4.8 and it looks to be working fine. But I want to upgrade to more recent one. I found that AVG installation was much easier and the memory usage is less compared to Avast. I want some suggestion on choosing the right version among Avast and AVG. The newest edition that I had seen on official site is AVG 8.0. Does compared to this Norton or McAfee is more effective.