All the upper level arrangers are great...most with great sounds features and quality keybeds..

What makes an arranger the best....flexability....we can do what we want..quickly, without limits..

Most "pros".. "Purist"...don't have a clue or hands on experience..for what they could accomplish with an arranger..

Myself, I prefer to limit the auto play parts..usually full piano mode, and use 3 auto parts ..drums, bass, and rhythm (guitar etc)..and almost always "bass on" with slash chords..

Quickly switch to SMF play with 4 markers..another big plus...On board sequencer for times when you need it..and onboard editing that rivals any keyboard....That is what non users are missing...