I had KN800, 1000, 2000 and 5,000. They were all the best arrangers available at the time, in my opinion. Switched to Yamaha PSR8000 because it had a pretty good vocal processor and harmonizer. They later changed the harmonizer, and I didn't like the later ones as much.
First Roland was G800. I sold it to a deep-sea fisherman to use as a boat anchor.
It did sound great though.