Yes - "The Gates of Delirium" (but "Close To The Edge", if the former's too much for a non-YES fan)
ELP - "Karn Evil 9" (but only from the 2000 DVD-A of "Brain Salad Surgery")
Howard Shore - anything from the surround mixes of "The Lord Of The Rings - Complete Recordings"
I've chosen them because the main point of surround mixes (to me) is to separate out stuff which is too musically dense for just stereo, and in the process, reveal things which were not clearly audible (if at all) before. But if it was a Floyd lover, I'd do "The Dark Side of the Moon" and "Wish You Were Here" albums for them.