I'm gonna have to go with 10/20/84 Syracuse Carrier Dome, which is just insanely jammed out. Rock n Roll!!!
and 12/28/88, maybe partly because I was there... in general I prefer the "newer" ones with the crisply defined descending lick intro to the older ones that begin more amorphously, sounding almost like LLR.
"There, in huge black letters, was 'The Grateful Dead'. It just... cancelled my mind out."-Garcia