They have had it for several years, but never really told the US about it.. I read about it a few years back in a British Mac magazine. At that time the review said that it was pretty bad software.
I have been using two versions Studio 3 which has four decks plus another cue output.
Version 2.6.1 which is no longer available has two decks plus a separate cue output.
Traktor can be very intimidating since it has so many bells & whistles.
Have you e-mailed Rick (Softjockrick)? He is the creator of Rockit and a sponsor on this board. He said that Rockit will play the I-Tunes files. Will you be buying mostly I-Tune files or MP3s? That is the question you should ask yourself. Either way, Rick can help you out and what better way to get support than from someone you know. Seriously. Rockit has a free trial period. Advise, check with Rick!