i always uaes KIS (kaspersky internet security) .. and now on win7 i run KIS2010 without problems.
It has everything (av,mail av,browser av,firewall,.............................. ) there are rly ALOT of features. if u dont need them, turn them off. It asks me for everything so i can always be sure not to miss anything happening on my laptop

Sometimes annoying but secure. Also it checks when some file as changed and checks that file again if it has changed to smth bad.
I´m not sure about how much ressources it takes and how it is compared to others.
this is also nice:
http://www.matousec.com/projects/pro...ge/results.php
seems like the comodo suite is pretty nice. i tried it a year ago and it crashed my windows :x but it seems like it has got much better
