Mixtrack Pro 2 vs Kontrol S2 vs DDJ-Ergo-K ? help!

Hello there forums i'm Rico and I decided on getting my first Controller i've practiced with friends so I know my way around. Basically I want you guys to help me on deciding which Controller to get I came down to the Ergo and S2 (I just added the Mixtrack for the hell of it). Ive heard only good this about the s2 and I know that the Ergo is newer and a couple of my friends told me to get that one because it had more features i.e the drum pads more controls over each channel effects etc... But I realized my research that almost everyone preferred the S2 over the Ergo and was wondering if you can help me decide which one to get if you guys are wondering i'm planing on using Traktor Pro 2 and if you guys got any cheap but good speaker recommendations for my mixers that would be nice! thanks!
-Rico :D