George the biggest problem for me...would be the 32 voice polyphony in an arranger keyboard...My experiences with Yamaha keyboards in the past[with 32 polyphony], has been poor...I know you currently own a Yamaha 32 voice keyboard, and apparently it works for you....Many of us , it does not..some have problems with the 126 voice models[PSR 9000]..My 64 voice PSR2100 did not handle it well..
It is not limited to Yamaha..my Casio WK3000, 32 voice...same story..