Good protection..?

I have Norton 2005, and that jus murders my system, its so greedy!, and it is time to renew it,
Im looking at McAfee VirusScan 2006, is McAfee virus scan good?, does it slow your PC down to its knees like norton, and whats the available protection like, and compared to Norton.
Many thanks, im thinking of getting this, but if its system greedy, NO way!
LOL
Cheers.
James
Im looking at McAfee VirusScan 2006, is McAfee virus scan good?, does it slow your PC down to its knees like norton, and whats the available protection like, and compared to Norton.
Many thanks, im thinking of getting this, but if its system greedy, NO way!
LOL
Cheers.
James
