For my part, the Columbias without a doubt. Nothing wrong with the Verve material, but I do prefer earlier Billie to later. Like JohnL states above, I just could not live without these recordings. They're among my absolute favorites in all of jazz. I listen to them on a monthly basis. Pres, Teddy, Benny ... imo, along with Goodman's RCA small groups, the Ellington Units and Lester Young's combos they are the apex of small group swing.