I own three of them, the McGhee Vol. 1, Foster/Wallington, and Gil Melle, all of which are great. For sheer ear-opening uniqueness I'd vote for the Melle. I was tempted to vote for the one I want the most, Howard McGhee Vol 2/Tal Farlow Quartet. I ended up voting for the one I listen to the most: Frank Foster/George Wallington Showcase.
Others have said this, but I'll reiterate---I wish Blue Note would keep these valuable re-issues in print a little longer.