Reply to Help deciding on a new setup...

Hey, So I'm planning on selling my traktor kontrol S4 to a friend. I've been believeing of a new setup, just wondering what you guys believe would be the best route to go.

First off I will continue to use Traktor Pro 2, so I plan on picking up a xone K2 as soon as they become available. Now I'm believeing of pairing it up with a standalone 3/4ch mixer. I've been looking at the xone 42 and price wise its in my budget. I would LOVE to pickup a db2/db4 but those are a little out of reach for now Basically what I want to know, is that a good option for a mixer? If not what would you guys recommend? I do plan on picking up some cdjs to mess around with in the near future(hence why I want 3/4ch).

Also I'm pretty sure I will need a audio interface to make this all work? Or will the k2 onboard sound card be enough?