Some people are never satisfied
So tell us about your NEXT arranger, then?!
Completely agree with the polyphony issue, though (not the OP, though!). If 128 isn't cutting it, you are going overboard. Be honest. When have you ever HEARD a serious dropout on a 128 note arranger? You trying to stack up five stereo voices on each note in the RH, then play with your foot hard down on the sustain? LOL
You are suffering from 'specitis'. A morbid fear of not having the latest TOTL feature, despite not actually NEEDING it...