Hiya Guys,
My personal opinion was four AV which were: AVG 8 (I use it

), NOD32, Kasperky, and Avira Antivir.
AVG 8 - Great Anti-Virus. It has a total new reform on the GUI which is a plus for me because I hated working with that old drab Windows 98 looking version. Onto more important things, the definitions files. I personally really like the new AVG 8 as they put in an anti-spyware scanner inside the anti-virus scanner making my double scan methods obsolete. Ofcourse I still run over with SpyBot just to make sure but AVG usually picks up everything and 'heals' it for me.
NOD32 - The best currently on the market. Has the largest definitions database and it is fast scanning. Just an all around great program. I can't speak much for it because I never had it but I have seen great reviews and other members of the MR Community have told me it's a great program.
Kasperky - I use their online scanner for users and it always picks up something in the end. Kasperky is best for server security.
Avira AntiVir - To tell the truth, I don't really like them but I have to say it's a great free AV. I don't really like the GUI or the way it updates which always makes me not use it. I would recommend it to a user due to it being free.