Wow, that's a tough one, Musical Marine. I know you're an MJQ fan, which tempts me to endorse the Hamilton set for you--others can explain it in more clearly technical terms than I can, but they were exploring some similar avenues in the 1950s. I like the Shank a lot, though you will probably encounter mixed opinions around here; the Giuffre is excellent. Never had the Baker sets, but I think much of what constituted the Baker Live box has been issued on individual CDs.
Do you have a non-Mosaic set--the Complete Nocturne Recordings? It's a 3-CD set of West Coast musicians recorded in the mid-1950s--Cadence carries it, and Dusty Groove, too, I believe.
Ever read Ted Gioia's WEST COAST JAZZ book?
Can you tell yet that I like West Coast too?