Hi everyone, i am just wanting to start dj'ing for fun and friends and am wondering what equipment i need. I like the look of the Pioneer CDJ-900 after a bit of research, but can you use one of these on their own to DJ? all i want is to scratch and mix some beats together, or is their something you'd recommend? also i was wondering what the difference is and what would be better, the CDJ 900 or the Traktor Kosmic S4, and what each does and what you recommend i get? thanks heaps!