A no brain-er for me..

The arranger (top models) are by far the easiest to use ..arranging or writing songs..

And also the best for performing too..It could be legit play.. piano, and left hand bass... a very good drum machine to use with your "legit" playing..

And when needed ..full arranger that can compete with most bands...even the bands Diki plays with ..

There is also a great arranger workstation keyboard (won't mention Brand and model)..that will do justice to the B3..draw bars and all..

When ever I play the top workstations..I am always glad when I get to play my own arranger...ease of use...sounds..flexibility...Arrangers cover it all...