Russ, define "furniture piano". Does that mean you MUST have a separate piano and that it can't be a conventional 'slab' stage piano? I think Don was trying to get you down to one keyboard and if that's doable, then I agree that the BK9 is probably the best single-keyboard solution.....I base that on the sound of my BK7m and especially the drums. If you must have a separate piano capable of supporting an arranger on top, then that's a whole different ballgame.
Another possibility is a good stage piano with a BK7m. Just brainstorming.
chas
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"Faith means not wanting to know what is true." [Nietzsche]