gee, I'd love it!
There could be a whole series of boxes... studio and live, big band and small bands, and some bonus DVDs on top of that!
There were some 2CD releases (three I think?), one of which I could have a look at when at brownie's last fall, but other than that it's just the stray disc - great to hear that Rearward is going to release more (though it's a drag that there's so much overlap with their own earlier compilations).
Here's my prediction: it ain't going to happen, ever.
What I'd like to see: Mosaic seek out and assemble a set of radio broadcast material of the band(s). I predict that would never happen too, but that's the stuff I need.