Just curious - What is the right board for you? Itd help us gage your review. Not questioning - your review is perfectly valid. All such things are personal and its for you, its not for you, its somewhere in between. There is never a right answer
I always had to much fun with the old Kurzweil Sp4-7 as bottom board and an Nord Electro 61 or Mojo 61 on top.
But don't get me wrong, i love Yamaha and also owned the Montage 8 for a while, (+ many other Yamaha's S90, S90ES, S90XS, P150, P200, P250, P90, Cp33) but Montage 8 being to big ...