Here's a few of my 'must-haves'... (from the G70)
Multi button pedalboard inputs (FC-7). I can't play without these.
Makeup Tools. Best easy editing of ANY keyboard, not just arrangers.
The sliders.
Pianostyle Mode. (no chord trigger until you play 3 notes)
The HB (Hammond) section and the GrandX (piano). Best meat and potatoes of any arranger.
The V-Kits. Best drums of any arranger (in fact, the only kits I use!).
The Song Link, Lyrics Link, and MIDI set Link to UPG.
The bender. (but I'd LOVE a Pitch-strip, too!)
USB, and the Card Slot (much more robust than sticking a USB stick in a port).
The Touch Screen.
You know... Maybe it would just be better if the manufacturers somehow ASKED us before they drop a feature. THEN they wouldn't have to wait until it's too late to find out they made a colossal blunder. Just a thought...
[This message has been edited by Diki (edited 08-30-2007).]
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An arranger is just a tool. What matters is what you build with it..!