Bob....
I feel it's the fate of live albums in general to have poor sound (well, maybe more so in rock than jazz).
You right...you'll find more better sounding live Jazz albums then you will Rock albums.
The Rock performers are too busy running around on stage, and checking out all the lovely women in the audience...

Their more into the "energy" of the event.... the show.

That said...here's a few I enjoy...(some others have already been mentioned)...
Michael Hedges - "Live on the Double Planet"....
Samples...Excellent sounding album...both the Lp and Cd...slight edge to Lp...but their both very good.

Joe Cocker - "Mad Dogs & Englishmen" ....
Samples...For this...the new remastered double Cd does sound nice.

For Jazz lovers.....
Ray Brown Trio - "Summer Wind: Live at the Loa".....
Samples...These "cats" are cook'in on this Cd....and sounding very good.

Keith Jarrett - "Still Live".....
Samples..."Still Live" is Jarrett and his trio in top form....clean and clear...no filler

And one more.....AC member Russel Dawkins will know this one...
"International Guitar Night II" -Various Artists ....a very well recorded Live Cd.....
Samples...
Get this Cd.....music recorded correctly...
