Thanks for the advice! I will go for the KP3 instead.

Mostly what I want this machine for is to be able to make reverb-builds like DJs do with a mixer with Traktor software.

For instance the most obvious example: remove all low end frequencies (I do this on the OT, though), fade in a reverb over all sounds slowly, then bring back the low end and release the reverb, letting a long reverb tail fade out.

Also the same thing but with a delay effect. (Is it possible to do both at the same time with the KP3?)

Would this be possible with the KP3? This is basically all I want to be able to do, as I can’t achieve the effect to my complete satisfaction with the AR performance pads. But obviously other effects and stuff would be cool to experiment with as well.