Reply to Traktor S4 vs DN-MC6000

I'm stuck between these two for a few reasons.. Is the video input on the Denon necessary? Do all djs stick to one program, if so, being that i'm somewhat of a beginner, is it bad to limit myself to one dj software by going with the S4? Is the looping, fx functionality, and job wheels of the S4 THAT much better? Is the S4 worth the pricetag???

any feedback would be great. Thanks