Like I said, I've got literally hundreds of bootlegs and the really early stuff they sound really good on, pre VH1 is all good. I thought everyone sucked on the US fest, I have a couple of shows from fair warnings and they're ok. I've got 2 or 3 shows from 1984 and they're almost unlistenable at times, they're all audience recordings but they're terrible. The band sounded alot better on the 5150 tour, I don't know if it was a different sound system or what. I've also got Dave live in Fresno form 86 and it's good but I've got video from him in Detroit and it's terrible...bootlegs are pretty much all over the place. Every recording I have from the f**k and Balance tours are awsome sound wise....teh 04 tour is all over the place. Dave was terrible in 94 but better in 02. Sam has sounded great everytime I've seen him, he can't hit all the notes anymore but his voice is in pretty good shape....
Sound quality was always good in the Van Hagar era, but the shows were cut and dry, predictable, dull. I'll take a few flubbed lines or a missed note here and there if it means I get back the raw power and emotion of the Roth era.