Which remasters to pickup?


Ive got a few old cds that that have since been remastered. I want to know which ones are worth picking up.

Sly and the Family Stone-Anthology Remastered
Cream-Remasters
Led Zeppelin-Remasters
Santana-Remasters
Al Green-Remasters
Isaac Hayes-Remasters (import)

I dont have an SACD player yet, but Ive got a few hybrid sacds that sound pretty good. The Rolling Stones are the best Ive heard so far, the Police are okay, and Im anxiously awaiting the new Pink Floyd DSOTM disc. Also feel free to recommend anything in the soul/old r&b/classic rock genres.
bundee1
If that question was for me:
I am almost positive it is a Sony remaster on redbook CD, and I picked it up at Best Buy for $9.99!
"What's Goin' On" was recently remastered on the original Motown/Tamla label for redbook. Actually, several weeks ago Best Buy was runnning a special where you could get both "What's Goin' On" and "Let's Get It On" remasters for $10 (that is total, not each). I nabbed them both, but so far have only listened to them on my PC at work, so I cannot comment on the sound.
Tom Petty Rewind Box Set!

Awesome Collection all remastered on HDCD. Sound is awesome and the set covers so much of his career. All the tracks sound better than ever... and the acoustic stuff!? Ahhh... to die for!
I agree with Danlevy

the Steely Dan, Peter Gabriel and Joni Mitchell remasters are very well done

might I add the Genesis Definitive collection, King Crimson 30th anniv edition, Todd Rundgren (british), and Elvis Costello (with bonus cuts) are all clearly sonically superior products and well worth the upgrade.