I am really interested in the chances of BackTrack. I can't really use it but there are many videos on the web which show that you can crack WiFi with it, etc... But against these illegal things, can you prevent attacks with it also? Or is there a better OS for this?
closed as not constructive by Terry Chia, AJ Henderson, Jeff Ferland♦ Apr 1 '13 at 4:55
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Quick side-note: BT5 is no longer the latest - you should look into Kali Linux.
There is no "best" OS for testing. You should always choose the tool that's most appropriate for the job.
A few thoughts: