I don't use the transpose that often, but it's nice to have the buttons on the Korg. I like having the octave buttons too, but unfortunately, on the PA80, it only seems to be able to control one panel sound at a time ( I use many combinations of two and three ), so it becomes utterly useless ( maybe there is a workaround in the global settings that I missed somehow ? ) . I love having the octave button on the Motif though.
Yeah.. I gotta reach around to the back of the KB ( both PSR2k and PA80 ) to control the mic input volume via a tiny tiny knob. I think if I remember right my 740 had a knob on the kb face. They went away from it.. What's up with that ??

AJ