Americans are obessed with celebrity, so an arranger keyboard endorsement by widely recognized respected musicians would bring added legitimacy and interest in arrangers by the american keyboard buying public (both enthusiast & pro alike). For example:

Quincy Jones
Chick Corea
Harry Connick Jr.
Elton John
Rick Wakeman
Stevie Wonder
Keith Emerson
Norah Jones
Scott Yee

Ok, ok, I couldn't resist. the last one is perhaps more wishful thinking.

Scott