Gram Parsons is an artist with a vision as unique and personal as those of Jagger-Richard, Ray Davies, or any of the other celebrated figures. Parsons may not have gone to the gate as often as the others, but when he has he's been strikingly consistent and good. I can't think of a performance on record any more moving than Gram's on his "Hot Burrito No. 1," and the first album of his old band,...