I wanted to find out about stores that carry a wide range of arrangers in Chicago area. I am interested in cheking out:

Technics KN7000
Roland VA76
Yamaha Tyros
Ketron SD1

Any idea? I have already tried local Guitar Center and Sam Ash. They only have Yamaha PSR series or Korg PA. Let me know if you guys know of any store(s) that carry these.

TIA