I have never heard a redbook version sound better than the sacd version but I don't listen to old dead guys either.
For those that want to hear what sacd is all about, check out DSOTM, Steve Earles Guitar Town, Allison Krauss Live or Joe Satrianis Strange Beautiful Music for starters.
Compare any of these to there redbook version on even a midfi setup and you will have your answer.
I have heard redbook and sacd versions of these on several 500.00 players,a 2k player and several modified players that cost even more.
One thing remains consistent, and that is sacd is far more natural sounding whith greater resolution than the redbook versions by a large margin in every case.
This repesents modern music from the 70's,80's and current releases.
After listening to sacd versions and comparing, the redbook versions become coasters in every case.
I just wish they would start releasing new material a bit quicker on the format.