Reply to Kontrol F1 vs MidiFighter Spectra vs Xone K2

Hi, First off my apologies I just became a member here.

I use a NI kontroller S4 and I am not a big shot Dj either. I mix tracks put in acapellas and now I want to expand my set and I looking at buying either the controller F1 or the Midi fighter Spectra or the Xone K2. I need some advise on this. how well do they work with Traktor 2.6 and will there be any compatibility issues running on Macbook pro 13" 8 gm ram running Mountain Lion (I would like include some button drumming)


Thank you.