The Kutiman set is pretty friggin' amazing.
Amon Tobin is the master of piecing samples together in beautiful, wonderful ways. Example. Though I think he's moved away from sampling other musical pieces to composing or doing foley studio work for his tracks.
mc chris has had a lot of his tracks remixed by snobots, which purely sample other songs, and for the most part they're awesome as crap. Fett's Vette is pretty good - I wouldn't have thought of Duel of the Fates working as well as it did, though my absolute favorite snobots mix is OMC, Back to the Future style.
