Whatever you do, stay away from the Cream Farewell Concert DVD...I got that for Christmas, and it blows goats. Horrible psuedo-docutmantary like commentary over the friggin' SONGS, all of which pretty much sound like they were recorded underwater. This DVD sullies the memory I have of seeing Cream at the penultimate gig here in the states, at the Baltimore Civic Center. The only good thing thing on there is Ginger Baker and Eric's reactions to the stupid questions the guys keeps asking them about thier playing.
Speaking of Joe Walsh, I also saw the original James Gang at the BCC...way back in the day, there was no large indoor venue in DC for concerts, so we had to head up to Bal'mer to see them. Anway, Walsh, Peters, and Fox kicked MAJOR ass...one of the best shows I've ever seen. They did the entire 2 first albums, along with most of Rides Again. Hard to believe it's the same guy who joined the Eagles...the chick band of chick bands.
As for Clapton, imho opinion, the best work he did was with John Mayall, and then Cream. I'm sure you know that Clapton's first recorded vocal track was on the first Bluesbreakers album....Ramblin' On My Mind. His guitar tone on the first Bluesbreakers is the bomb yo. 50w Marshall Combo and a Les Paul...same setup Gary Moore used to do his blues stuff....specifically, he's using (among others) Peter Green's old guitar...the one with the mysterious really out of phase pickup sound. Check out Blues for Greeny...Moore absolutely nails Green's guitar style on a couple of those tracks, and the sound is exactly right.