Yamaha DX5

via this auction

Not the best shots, but you don't see these often.

"Rare 76-key Yamaha DX-5 from 84 or 85. Has the power of two DX7s in one. You can do a single voice, or layer two or split. Has separate outputs for each voice. Has a large back-lit LCD and more on-surface buttons for editing than a normal DX7."

The auction states "basically the same as a $3,000 DX1 without the extra 150 lbs of wood and lights." The lights that display the algorithms on the DX1 are pretty nice though... See this post and this post.