Reply to Xone mixer need questions.

Im looking to buy one of the following mixers.

Xone 62
Xone 92
Xone 464

What I was wanting to know is which mixer can be used as a USB controller for Traktor Pro. Ive been reading and reading and reading but havent came across my answer and also been watching youtube videos. Wanting to use the mixer with my midi controllers but Im not sure if I need a Audio 4 or 8 to hook the mixer up in order to work with my 1d and x1 either. Ive only been using Traktor and Midi controllers for a little over 2 months so Im a little confused when it comes to seeing people mixing with a mixer and using midi controllers instead of decks.

Thanks for the help DJTT community.