I suggest that you should not choose BitDefender, because I notice two disadvantages with BitDefender's capability.
1 - has not web protection for spam
2 - software requirements is a little extreme
If I were you I wouldn't buy the first antivirus product you see, because what you see is what the company is expecting you to see. All I can say it's your decision.
This is entirely my own observation and I doubt that BitDefender have the same file search technique as Panda has for file archive with archives inside of an archive like this.
Spoiler test.rar (50 files)
[rar archive]
test1.rar (10 files)
file01
file02
file03
[rar archive]
http://www.pandasecurity.com/homeusers/downloads/ can search for every file and almost everything in that file archive of any known or unknown threats to your system. It also has an excellent free http://www.pandasecurity.com/activescan/index/?lang=en-US which is updated in real time. :user: