Compared to the rest of you, my experience is very limited with different arrangers.
Had I not gotten the Tyros 4, I probably would have been content with the S950.....but once we started using the Tyros....well the rest is history and the S950 is now owned by another.
Tyros 5 is now calling but given what a great arranger Tyros 4 is, I can still resist the call.