Seems to be a really excellent box set by your recommendations. Great to hear remastering/?remixing has improved the sound - I've had some bad experiences of remastering totally destroying the feel and the sound of the original. I had to search for ages to get the original recording of the Mothers Of Invention's We're Only In It For The Money album, as the 'remastered' rerelease sounded bloody horrible to me!
Same with Pearls Before Swine's amazing album The Use Of Ashes [probably my most favourite album of all time] - totally wrecked by the fool who remastered and remixed and ruined it, putting the xylaphone notes much too loud and distracting from Tom Rapp's wonderful lyrics on the song 'Tell Me Why'.
Shame that I also can't consider buying this due to my financial circumstances!