Should I get the Norton internet security for Mac to use in my brand new (not delivered yet) iMac? I was told by the Apple Store sales guy that its not necessary. Coming from a purely Windoze background, I have a well founded paranoia of my internet security. Is it worth the $79 for piece of mind, or is my Windows experience clouding my judgement regarding this issue? My ISP is Charter Security, and they have a free Security Suite (from F Secure). Is this a workable option? From what I've read online, it doesn't even protect a Mac... Thanks in advance.