BEWARE the Roland EXR-7 amplifier/speakers are unuseable IMO. You would have to purchase an external speaker system for the EXR-7. Possibly overdriven? THis is a non-starter for me. The EXR-5 does not have this problem.
Jamman said "(functionwise these EXRs are in psr 550 catagory)" The EXR's cannot create a style, the PSR550 can.
Starkeeper