Depends on the music you play...and IF you sing, IMHO.
I need lots of styles because I do only instrumental, no singing and I do orchestral versions of songs. And I need top notch sound quality, because that is the performance. I use the multi-pads too.

In fact I need to do more playing with MIDI files as I think it could prove to be better for me on some more complex songs.
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Lee S.