Mellotronists

The Synergy synth was a real powerhouse back in the day, digital synthesis 
and direct connectivity to Apple II, I believe.  Had floating splits, poly 
portamento, lots of real striking FM type sounds.  Was a direct descendant 
of the monster digital synth, the Crumar GDS, that Wendy Carlos made a lot 
of use of on the "Tron" soundtrack, as fate would have it.

And the white one is an M400.