Good suggestion to consider. Really depends on what the user wants. It's good to have variety in the sound and style engines but one limiting factor is carrying multiple boards etc. would be a tough ask.

I don't really get it as to what is stopping Korg and Yamaha from coming up with arranger modules instead of the full keyboard. Personally, given the budget and if carrying multiple boards is not an issue then I would go for a usedYamaha 910, korg pa 500 and a roland bk-7.... and I could squeeze in a Medeli A800 as well

Frans, how does that Medeli sound ? May be on an other thread .They claim a new model A1000 would be launched.