I've always used AVG, I've tried others but there's something about AVG that does it for me. I agree with Techpro that the updated GUI is an improvement over the old one. A vast improvement.
I put a lot of faith into AVG and although I've currently never had a virus since about '95 when things were more unreliable, I know that AVG will be able to find, and heal any virus I might get in the future.