My first Mingus purchase, chosen because Ah Um has such a reputation as a Jazz classic. And it doesn't disappoint.
That said after a few listens I found myself putting on the second disk MINGUS DYNASTY just as much, perhaps more. Dynasty is more arranged, a little more complex, but still beautiful tunes. Mingus was name-checked on Zappa's Freak out cover and listening to Mingus Dynasty I get a real sense sense that Mingus was a significant influence on Zappa. I guess that would lose a star or two for some!