Hi Rikki ,good question .I'm using a Yamaha PSR3000 which was made specially for me it was a keyboard , all keys removed , also speakers .and fits in a special flight case with my musictech receiver for use with my Midi acoustic accordion .
I've been gigging with it for about 4 years love it plus all the very good Yamaha styles .
I was a technics boy for many years !! the one style I really miss is the one technote produced called sound of the 60's and it is the exact style for the Dusty Springfield hit "you don't have to say you love me" it really touches the spot !!!
guess you can't have everything in this world !! ...........
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Giovanni