A little while ago, I put on my favorite Internet radio station, Cesky Rozhlas D-Dur (yes, I am leaving out all the diacriticals), and found them playing the Faust Symphony of Liszt, which I'd never heard before.
What a whacky piece! The section I came in on sounded like outtakes of Schumann's symphonies, and 20 minutes later it turned into purest Wagner. A bit of a mess, but a really beautiful and memorable mess, conducted with plenty of commitment by Simon Rattle and with Peter Seiffert, last year's San Francisco Tannhauser, singing the tenor solos. Must buy!