Reply to First Vinyl DJ Set #Help

Sup DJ's & Procucers!
So I wanted to go vinyl after my Numark Mix Track Pro experience, and already have some products:
- 2 Stanton T62's
- Speakers
- 2x 120 Watts Amplifier
Of course the mixer is missing and in my case the Time Code (Traktor A6) to.
I am very interested in these 2 mixers: Behringer NOX 404 and Beringer NOX 606.
The 404 is a 2 channel mixer.
The 606 is a 4 channel mixer.
So would I be able to use the 2 extra channels when I connect my gear with Traktor's A6 Sound Card (I want to use this to load my music in digitaly), or not?
Because the traktor A6 is limited to 2 turntables...

- MJJG