I think I can spark a better opinion on it now:
I did a reformat a few months ago, and I felt too lazy to dig up my avast serial number, so I installed AVG.
I am really not liking it. Its annoying how it does updates, its annoying how it tells you you should upgrade to the next version, and its annoying how the entire control panel is layed out.
Definitely stick with Avast.
The only reason I havent gone back is simply because I am lazy, its on my list of things to do.