Setup suggestion?

Hi iv got a setup up of 2 x CDJ850s and a numark X6 mixer. I recently purchased Traktor pro 2 which i am now using my CDJs to control through my desktop PC.
Im now looking for a way for me to control my Traktor mixer. Which mixer would be a good purchase for this?

Also i seem to be having issues with using my headphones through my PC. I have speakers connected up to my numark mixer which i use when im djing through my mixer and i have a good set of harman kardon PC speakers which i use when djing through traktor, when i plug my headphones into my PC all i seem to hear is what is coming out through PC speakers i cannot seem to get a differant track in order for me to cue it up. Any suggestions?

Thanks

 

This one seems to be the cheapest Behringer DDM4000 DJ Mixer to control Traktor.

You won't hear anything in your heeadphones if you hook it up to your laptop. You should always hook up the headphones to your mixer.

 

Thanks for reply.

Played about with traktor setting last night and i have set it to external mixer and iv have managed to get sound from traktor coming through my mixer then through my mixer speakers and i can control traktor using cdjs with my headphones connected to mixer

 

how can you assign the interface to interact with your mixer?

 

Depends what mixer you have.

 

I have the numark x6