What kind of equipment is good for a beginner DJ?

out of any of these i would suggest the omni control, it already has an audio interface/soundcard (unlike the others) and comes with Traktor LE(you can upgrade it later). It is probably the best deal around for the general price range of these controllers, now if you have a higher budget or not one at all then i would suggest getting the vestax vci-300, or the Numark ns7. I hope you find something that works for you.