Well, first hi to all people here.

then, about wich is the best comercial antivirus I think that Kaspersky is th best. Easy, fast (don't slow your pc). But it's very dificult to get a key for long time.

Then in my House I use NoD. Its really good too and it's very easy to get new licenses everywhere.

In my work we use Panda, but its very slow. And McAffe it's so simply to break.

Then I think that kaspersky and NoD are the best comercial antivirus at the momment.