I definitely prefer 5.1 to 4.0, but if the position they're going to take with some of these releases is, 'we can't do a new 5.1 mix, but we can reissue the old quad release', then I will definitely take it. Some of the quad reissues from recent years have reminded me how good they can sound, and how much I liked them before. Some examples:
Gentle Giant - Free Hand (DTS 4.1)
Gentle Giant - in'terview (DTS 4.1)
Electric Light Orchestra (DTS 4.1)
Chicago Transit Authority (DTS 4.0)(mistakenly marked on the packaging as a DVD-Audio)
I certainly wish that these were all DVD-A, but the basic fact is they all sound excellent. If there were more quad releases, I would certainly snap them up whether they're SACD or DVD. If they're albums that I like, that is...
I'd love anything from ELO, especially Zoom.