A 2nd on the John Hiatt and Muddy Waters recommendations. New West Records doesn't charge an SACD premium on the Hiatt; I got it for five bucks during one of the label's sales!
I love the Dylan w/ The Band Planet Waves album (both musically and sonically), and Mobile Fidelity offers it on a hybrid Stereo SACD. It's clearance priced right now at $19.99; get it while you can!
One of the best sounding albums I've ever heard is Tea For The Tillerman by Cat Stevens. Analogue Productions offers it on a hybrid Stereo SACD for $30.00. Cat is a little too "girl's music" for my liking (I once played it while seducing a young woman ;-), but the sound is really incredible. Good for demoing hi-fi equipment if nothing else.