reloop terminal 4 mix is the only one that ticks all the boxes, it has 8 buttons you could map to cues/samples/effects ect… there is 4 absolute knobs for effects, full eq and seperate filter. the jogs and most importantly the crossfader are scratchable. If the VCI-400 had a scratchable loose crossfader I’d say that’s the best option.
You should note that in traktor you can’t scratch on any controllers other than the S2, S4 or 4trak. And you can’t map in serato intro or itch. You can do it all in VDJ Pro… you could even run timecode to add a record deck.
There was a great review of the tm4 by phil a few weeks ago on the blog.