I have played in bands with my keyboards (Technics KN6000 / Tyros 2 / PSR 3000) and never once did anyone question what type of keyboard it was or comment on how it looked.

most band members that I have come accross(guitarists / drummers / bass players / singers) don't even know what an arranger keyboard is compared to a synth.

I have seen some live bands on TV play at very special events using cheap low end keyboards which is also surprising.

Nick