Reply to External Mixer w/ APC40 or X1

I currently own an Allen and Heath Xone:42 and an Akai APC40 with an Audio 4 as my sound card.

I'm really conflicted at the moment as to what setup I should use:

1) Xone:42 + APC 40
2) Xone:42 + Xone K2 or Traktor X1 or Reloop Contour
3) Get rid of it all for a Kontrol S2 or Denon MC3000.

I don't plan on scratching all too much, so I'm not sure what I need jog wheels for besides scrolling through songs. I went to Guitar Center and played around on the S4 which was quite fun. I really liked the interface, but at the same time... I really like using the Xone 42 for external mixing (plus the AH filter is awesome).

Is there any real difference between the setups I posted? I feel like the difference between the controller and an external mixer + X1 or K2 is just that the mixer + X1 will be more modular vs a full controller.

I'm leaning towards getting rid of the APC40 for an X1 or K2 since I don't find the APC 40 very friendly for Traktor. Or maybe I just haven't found a good map yet.

Thanks for the help.