thats pretty funny I am in the same rutt. I would say the vci 400 EGE looks like a great controller similar to the s4 but with more expression. I think as a controller alone I looks like more fun and more useful, however I think the s4 + MF3D looks like a great bundle which could be much better if you are a knowledgeable mapper and can recreate some of the expressive sections of the 400 with the 3D. I also think that the current DJTT s4 mapping is not the best mapping from the way I understand it, I could very well be wrong but I believe that the sample play/cue points 5-8 buttons are always in jog effects mode and cannot be toggled out of it, this does seem to be a fairly easy problem to resolve with some mapping knowledge but otherwise could be quite frustrating.