I have the Maffy Falay, Rena Rama and Iskra. Of the three Iskra is the most interesting, Falay the most fun and Rena Rama the least played. I'd say each of them merit a stream on a quiet day but none is essential.
I'll be interested to hear views on other titles, good thread.
Liebman was fantastic and one of the first great saxophonists I saw live and bought his DrumOder and Lookout-Farm, by the way the only ECM albums I purchased in my live.
I think that was the tour of autumn 1973, when they did also Stadthalle Vienna . Keyboard........well Miles played just fine chords on Organ, it can be witnessed on "Dark Magus". In general I´m not a keyboard (synthi) freak, for example I liked the comeback band in 1981 when they still had no keyboard, well I saw Miles doin some chords on organ all the time.
The only keyboard player I finally liked was Japanese Kei Akagi, since he seemed to be a pianist and think as a pianist even on those 80´s keyboards. He played fantastic solos in that last band or so.