all i require is a DVD and hard copy manual for each and every arranger or synth produced going forward.

The DVD should be divided into 3 segments

1. Getting started , basic funtions and features how they work
2. Sound and style and song creation with in depth demos of editing, changing , routing and editing effects.
3. Advanced user with tips and tricks to achieve quicker results for both home/studio play and live play.

If the DVD is good enough i would pay extra for it.