New Set up

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Hey I am about to get into DJing. I produce my own music and I am making sure the hardware that I am looking at seems like a good set up. A Denon DN-X1600 4 Channel mixer, Native Instruments Traktor Pro 2.5, Native Instruments X1 and Native Instruments F1. Do I need an interface for this? Do I need a sound card? Any thoughts or recommendations would be appreciated. If anyone has worked with these products post what you want! Thanks!