Just wondering about this as I recall some mention back on the old BNBB that the masters might no longer exist. The discussion at the time as I recall related to the somewhat compromised sound on the BN Collectors Choice CD of this one put out in the 1990s. I've never been 100% happy with the sonics of that particular CD.
I've recently taken the plunge on a UA deep groove pressing of this one (one of the 'wall to wall sound' series) and it certainly sounds better. Really great session with a stellar big band lineup with the likes of Art Farmer, Harry Edison, Bob Brookmeyer, Zoot Sims, Al Cohn, Phil Woods and Gene Quill. Really the cream of the crop from the NY studio scene at that time. Strange that this one isn't better known, its up there with the Miles & Gil in my view in terms of interpretation.