Great suggestion, Rory...I haven't seen number pads on a higher end arranger (at least any brands that I'm familiar with) in quite a while; the last one I remember was the Yamaha PSR-SQ-16.

There's a reason, or reasons why they aren't used much anymore on arrangers...perhaps it is cost, or perhaps they weren't popular enough?

Number pads are more accessible for the visually impaired, am I correct?

Having registration memories has helped a bit, I suppose.