Reply to New mixer: Xone42, djm850 or KONTROL Z2?

Hello all, I come here to make a request for help choosing a new mixer. I've been researching on various websites and community s and come to some conclusions but still would like to hear your views on this matter. Thank you for your availability and I am sure that your answers will be a great help to me.
So this is now the time that I've been looking for a professional mixer, vestax currently have a 002, and a one KONTROL x1 sound card audio KONTROL 1, wanted to upgrade the mixer and my first choice goes to a mixer xone 42 .
My questions are whether the djm 850 or TRAKTOR KONTROL the z2 options would be better or worse in my case, advantages and disadvantages of these mixers over the xone 42.
Thanks again and I apologize if my English is not the best, because it was remixed with Google translator.
Cheers to all.