I use Avast, it's pretty good. I have to use that for UT Martin. Their internet isn't compatible with AVG.
The only thing about Avast is it has this thing called AutoSandbox, and it will try to put DBO into it. All you do is turn AutoSandbox off and it'll work fine.
I use Malwarebytes. Everything else seems to use so much memory that it messes with my games, but Malwarebytes only uses like 1.1k. It's really small, great for gaming.