Reply to Need a quick answer!

So I want to upgrade from my Stanton SCS3 System, it's to difficult to jump around and switch to all of the modes and be really effective with it. I'm going to trade it in and do 1 of these things: I can get the Pioneer DDJ Ergo or the Traktor Kontrol S2 for $509+tax. OR I can get a Kontrol S4 for $765+tax. LASTLY, I can wait for the VCI-400. Which do you recommend?? Help!