Douglas, I doubt MGM will rerelease their 6 Film Chanthology in more definative version (Extras like Audio Commentaries, Featurettes, etc. like the Fox Box Sets). However I highly recommend you upgrading your VHS copies with the MGM Box Set.
I bought this box set the first day it came out. You know what? Actually, as far as them being low-budget, I really didn't notice. These six are actually pretty decent with the right amount of '40s cheese to have some pretty darn good movies in there.