@Fleetwood-Matt for me it's the Jay-Z unplugged. The Roots were the backing band and Mary J. Blige did backing vocals. It's one of my favorite live sets ever. So good.
On tap for me. Nirvana, Oasis, Alice in Chains, Pearl Jam, STP and Live. I remember vividly watching those all growing up. Too bad the only have REM's 2001 session and not 1991.