AVAST Internet security

I know alot of people here like AVAST Anti-virus free edition. What about the paid version "internet security"?

I would assume that it is an entire security suite complete with email and spam protection, firewall etc..

My question is would this be a good suite to get or would buying separate protection elements e.g (anti-virus, firewall, spam and email) from separate manufacturers be better. I hear so much about the Avast anti-virus, but not much on their firewall?? I guess I'm just trying to find something to replace McAfee total protection when my subscription runs out and kind of like the idea of a total suite.