I'm with Lon on the Keynote set. I'd also like to see a set featuring the Verve Recordings of Jimmy Giuffre.
Also maybe some kind of set featuring Barney Wilen's work. His stuff fades in and out of circulation so fast, that its hard to keep track of just what is available.
How about a set of the Toshiko Akiyoshi/Lew Tabackin Big Band? To have all that great music collected together would be fabulous!
And just to be a little more greedy, how about some sort of set spotlighting Tommy Flannagan. I think he's one artist that we never discuss here and perhaps should!