I agree with Chuck. While Pablo recorded some terrific artists, most by that time were at the tail ends of their careers. There's still some good stuff to be found, but I find I usually pull out some earlier work to listen to or something more, uh, challenging given the dates of the recordings. To me Pablo is the 70's version of Concord. I understand that's damning with faint praise, but both are fairly conservative labels. Still, Duke's "This One's for Blanton" is very good, as are some of the Basie, Harry Edison, and Clark Terry dates (in addition to the other artists previously mentioned). And let's not forget the Art Tatums. Personally, I'd stay away from most of the Ella Fitzgeralds.
Ray