Just like flyfishing products there are lots of opinions on software.
I had and hated most of the big name programs. Getting completely rid of McAfee is a tricky proposition but it can be done without reformatting your hard drive. It takes some registry work and some clean-up programs but after it was completely gone; I went with what was recommended to me by a Microsoft tech support person from Hotmail:
Trend Micro
It doesn't hog system resources, it includes a full suite of products like spam blockers, spyware, firewall, kiddie protection, key logging protection and lots more and is boxed as a three licence copy at WAY less than McAfee or Norton. I get a discount each year for a new license and pick up my copy at Staples.