Hello BH.
I live in Belo Horizonte, Brasil and at last years(20)working as profi musician and music software teacher.I had played a extensive amount of arr. kbs as Yamaha(5700,6700,6000,
630,8000,730,740,9000)Korg(I3,I2,I30)Roland(E20,30,70,86,96,G800,G1000,Em2000,VA7)and Technics(1500,1600,5000),each one with good and bad features.The dream Kb would have:
-Easy operation and good voices as a Yamaha 9000
-Friendly screen as a Technics
-Good styles as a Korg or Solton
-Good Midi files operation as a Roland.
-Excellent harmony interface as 9000.

and NO!!!

-Weight of Yamaha 9000.
-Korg's difficulty to read fast change of chords(sometimes a broken change)
-Technics incapacity to make midi files with
real time acc and bad acc. sounds with transpose.
-Touch screen , variphrase(a expensive joke)and poor styles of Roland VA7.
I think that you must read all George Kaye and AJ evaluations.
Another important topic is evaluate the technical support in your country.

Brazilian regards
Chico