I have Online-Armor on my laptop and I find it excellent. There's 3 varieties to choose from - O-A free, O-A Premium and O-A ++, which is the equivalent of a Fort Knox gold vault.
It's pretty good to use, doesn't want to take over your computer, and it gives you a number of options when it discovers something that it doesn't like or recognise.
It rates 5 cows, and it's got a number of other awards and kudos as well. I'm very happy with it, it's certainly amongst the better AV setups.