Stevie-Ray is my best. He kicks Claptons arse in the live shows. It has been said that no two shows were the same with Stevie as he could improvise with the best of them.
Its been said that he never played a song exactly the same way twice. :o
I do love Clapton but I would go even further than you Sock and say that he reached his musical Zenith while he was in Cream.
I always viewed "Layla" as a very well thought out album, and arranged more like an orcastra piece than a Rock n' Roll record. I like that a lot for some reason, even though I seem to like SRV's improvised style better.

After that though, I really don't think you can do much to top a record with such manolithic porportions as "Layla, and Other Assorted Love Songs". ;)
Us here in Up-State New York are lucky enough to have a really really amazingly good SRV and Double Trouble tribute band called Direct Drive, and I've been lucky enough to see them on several occasions. This guy was one of the best guitarists I've ever seen! I wish these guys would write some original material, because, record industry willing, they could be huge with Blues fans. I think its about time more Blues and Blues influenced music hit the big time! Tired of screaming kids playing a bad guitar. :P
P.S. You'll be getting a PM soon, Pete. 8)