Best quality sound bootleg ?

Out of interest, why would it be a soundboard? There are loads of audience recordings that are better than any soundboard.

Ok then forgot "soundboard", just what is for you the best quality sound boot ?

Ive always thought its the unedited DAT recording of the Kilburn 1992 gig, so much better than Show.

 
I hear this a lot and have yet to encounter too many AUDs that sound as good as SBDs. To be sure, unmixed soundboards can be dodgy, but there's a good AUD capture and then there's "live album quality" and I think that's what the OP is talking about. 

anyway... here's a short list of some good SBDs:

12/12/79
4/20/80
5/31/80
6/10/81
6/7/82
11/16/84
10/22/85
8/9/86
11/1/87
Plainsongs: Prayer Tour SBDs
8/4/90
1/19/91
5/3/92
6/25/95
9/15/96
10/31/97
12/10/97
8/22/98
4/11/00
7/1/01
Trilogy DVD Rip
11/9/02
8/9/04
8/18/05
12//13/08
4/19/09
8/24/12
8/4/13
10/12/13
11/3/13
9/10/16

I like the Prayer Tour boards because even though the aud is missing, I have SOOOOO much audience capture from that tour, it's nice to hear the instruments on their own. It doesn't bother me in the slightest.

Same with the Trilogy rip. I don't know the providence of my copy. I think it came from the Pirate Bay maybe?? It's lossy, sure but it still sounds better than just about anything circulating. I put it on for comparison's sake and I am just letting it play... it's amazing. 

I had Trilogy on last night - of the 3 albums, Disintegration takes ages to get going. Pictures and Closedown in particular are really tentative performances. It gets better as it goes on but its a slow start.
Never noticed before but it might be the only performance I can remember where Robert and Simon arent playing to each other at the start of Pictures.

Some ones which come to mind in my collection are:

• The version of the 1980 Herford, Germany show mislabeled as Brussels 1980 (it's called Super Golden Radio or something like that)
• Ontario Theatre in Washington DC 1984 AKA Cold
• Leysin, Switzerland 1990

I like the Kilburn one a couple people have mentioned too, but it's a bit lacking in midrange.