Personally, I have a HUGE problem with 73 note keyboards. When playing bass parts, I NEED that low 'E' just for the full range of a standard four string. Having it stop at 'F' means you have to transpose the bass section down an octave, and now you have at LEAST six notes completely useless, even if you use a five-string bass's range, and nearly an octave if you want only a four string's.

Great if you are used to a Rhodes, but lousy for anything else...