E M U L A T O R P R O T E U S - no other instrument has ever knocked my socks off like that one in 1990, when the first affordable sample-based instruments had just come out (Korg M1, Roland U-20...). The Proteus was one of the 'kings' of realism for that time, and I was fascinated about its orchestral sounds. Now of course, perception has changed so much that the demo songs can't impress anyone and sound deficient.
Emulator continued to manufacture such racks until about 2000. I think this orchestral one was the last one, and for 1999 it really sounds excellent:


One of the former heads of EMU is now said to have announced to take up production of modules again. However, it seems to be focused on electronic/analogue sounds frown I don't want to abandon hope that it will also include new orchestral racks/modules...