If Bill Monroe was to mountain music what Louis Armstrong was to jazz, then David Grisman is the Miles Davis of bluegrass. DGQ-20 is kind of Grisman's 20-year housecleaning. The collection on Grisman's own Acoustic Disc label consists entirely of previously unreleased live and studio recordings featuring the dawged jazz/bluegrass mandolinist working in tandem with the likes of Stephane Grapelli, Vassar Clements, Jerry Garcia, and the Kronos Quartet. Listening to all three discs will leave you dawg tired, but exhilarated. --Steven Stolder