Can I get some opinions about Yamaha's beautiful 5 octave YM-6000?

this instrument sounds good. Some specs about it that can be uncomfortable to the player. 1). It's not height adjustable, I believe it was designed for Keiko Abe, so it comes at a height for her. 2). The space between the upper and lower mannuel of keys is greater then most marimbas. The bars are larger then the codenza model of the yamaha especially on the lower end (very close related to the Malletech bar width in the lower end). Some of the older models resonators have a tendency to rattle.
The instrument that I have been playing on is an older instrument, we got new resonators and have had a couple of bars replaced but it sounds great. Hope this helps.