Reply to Noob! CDJ's or DVS?

Bit of a noob to DJ'ing. I play guitar and have always bought good gear as it can be a false economy to buy otherwise, plus the resale value is nowhere near what you bought it for in the first place. I have dabbled with software such as Traktor Pro, Ableton Live, and Serato. Out of the three I prefer Traktor Pro for mixing tracks. However, that is all I have been able to do using only a mouse, keyboard, and midi keyboard. So, I'm looking to purchase some hardware.

I am clear in my mind that I will not buy a midi controller - period. That leaves either CDJ's or turntables. I am finding it difficult working out exactly what I want and how much it will cost. On the one hand I could buy two turntables, a mixer, and then the traktor DVS package. Any suggestions on what mixer to get with such a set up would be much appreciated.

The alternative would be to get CDJ's - possibly the CDJ 400's. I understand that the CD decks themselves can connect with Traktor. What I am unsure of in this particular scenario is, "would I be able to get a mixer with the same connectivity, without the need for purchasing an audio interface for the mixer?"