I'm afraid, AYPCN (time for a shorter name, dude!) that the world has moved on. Not including a full sequencer, for MOST people, seems a fairly common thing these days. Not everyone is a computerphobic as you are. To my mind, no onboard sequencer (but exceptional header editing) is a PLUS, not a negative! Leaves more R&D money for 'arranger' features.
One BIG improvement over the E60/50 is the individual Part EQ's, and a HUGE improvement over the Prelude/GW is the return of detail Drumkit Makeup Tools with individual drum sound EQ's.
Something has me puzzled, though. There's a couple of buttons on the front panel (Variation 3 & 4) sub-labeled 'Mark A repeat' and Mark B delete' which I can't find any reference to in the manual. Maybe this is a Mark/Jump feature for the SMF playback? Puzzling...
_________________________
An arranger is just a tool. What matters is what you build with it..!