Turning 70 and marking a golden anniversary would usually find an iconic entertainer relaxing and raking in the accolades. But bluegrassers don't like sitting still, and one of the hardest-working seniors in showbiz crowned this landmark year by re-recording 32 of his best-loved songs in a few marathon recording sessions. This five-CD box set features 50 songs, but only 18 are previous recordings. It's daunting to think the band could improve on the old man's well-known standards from the '60s and '70s—but compare them and it's clear that the patriarch sounds as good, or better, than ever, and the boys once again earn their rep as one of the best string groups America has ever produced. MICHAEL McCALL