Well, I differ from Lon on the Nelson material. What I have of it makes me want to hear all of it. To me Oliver is a funny big band writer. I've heard stuff of his (for example, on the Verve Jazz Masters compilation) which is really incredible and whets my appetite for more, and other stuff which seems a bit (hate to use the word) lazy, where it seems he could have done much more (the Jimmy Smith and the Live from Los Angeles dates) are like that.
I'll probably get it the Nelson, though it won't be a priority.
Too much big band stuff from Mosaic? No, not at all. In fact, I wish they would do Woody Herman's '62-'64 Philips dates. Fabulous music.