It probably sounds stupid, like I'm a spoiled brat but,

each keyboard will do a particular thing great. but will lack in other departments.

One keyboard will have incredible live band type styles but will not allow switching to midi file playback fast enough or have an issued with polyphony.

Or midi file playback and switching are great but styles and portablility a problem.

I have said it a couple times on this forum, but the SD1 had probably the closest to what I was looking for in styles, sounds, midi playback, and vocalizer, but its ability for registrations was backward ass, and the fact that you had to go into a midi file playback mode I hated and took too much time. also i had considerable note drop off.

If the new Ketron flagship address these issues, I think we may have a winner.

All these keyboards were great, I'm just looking for the best/