Reply to New Set Up HELP DJM800 + 2- Kontrol x1s + What interface 4 channel mixing

Hey guys, I'm just in the process of changing my set up over to 2 X1s and my DJM800, the question I have is, can I get any interface (because I would like one that will be good for producing, as I am just starting to scratch the surface there) or do I have to get a traktor audio 8 or 10 if I would like my 2 Kontrol x1s to be run into the four channels on my mixer. The interfaces that have the most appeal to me and my budget are the M-Audio Profire 610, Akai EiE Pro and the Apogee Duet. With the Akai and M-audio would it be possible to buy 1/4" conversion cables to RCA, so that I could have the outputs from the interface running into the DJMs 4 RCA channels? If you guys can help me out here or have any suggestions feel free to put your input in.

Thanks!