I got the LTK SE DVD in the mail and gave it a spin for a few scenes. Wow! The 5.1 mix is way better than the UE. I suspect it's more faithful to the original theatrical mix.
The only downside is obvious print wear, and at least one nasty compression artifact in the bank scene, where the encoding seems to choke on the fine detail of the wrought iron staircases. It's also not the fully uncut version.
Starting the hear the siren song of those lovely old LD's on Ebay. Must resist! ;)