Kool Keith is one of the biggest trippers out there. Saw him years ago, off guts. Also caught his compadre Motion Man with Kutmasta Kurt ages ago too. Got them to sign a bunch of stuff.
Swollen Members, one of the best live acts i've seen. Seen Mix Master Mike twice on his own and another 2 times with the beasties. Caught Beasties, J5 and Snoop a couple of years ago, snoop was a last minute surprise annoucement and I kid you not, I never listened to much of his stuff but he put on an unreal show.
Hilltops, always a good show. Muph n Plutonic also good for a watch. The herd, I jumped on stage and asked the chick from the herd to marry me once.... LC was funny, and koolism were good too live.
she said no. Good show none the less.
Plenty of others, not heaps of big acts though. I do want to check out Qbert some day, and the Roots next time they come around.
For local acts, check out Illzilla, SS Pecker and DJ Mugen, all good underrated stuff!