The best one my opinion is bitdefender internet, it has im encryption, antivirus, antiphishing, antispam, privacy protection, firewall, and more! I have it installed for about 6months now, and it works great.
The HTTP scanning engine slows down surfing.
There is a bug that causes loss of window focus while typing an email.
The antispam plugin is very buggy and sometimes does not work at all. I did have a running conversation with tech support about the problem. I gave them tons of useful information but they seemed to have given up since I haven't heard back from them in over a week. I asked twice if they were working on it but they failed to respond.
Time to move on.
While using Norton Internet Security 2009, a virus was able to infiltrate my firewall, attack, and destroy my computer. It will not even boot up at this point. I had to purchase an entirely new system thanks to Norton Internet Security 2009. Good luck with that.