Fans love the way Matthews reworks his music in the live setting. It's something he does as a part of the Dave Matthews Band and when he plays acoustic sets with longtime collaborator Tim Reynolds. On Live in Vegas, recorded at Planet Hollywood's Theater for the Performing Arts, the pair really outdoes itself. These aren't so much songs as open-ended meditations full of throaty howls and heady jams. For those who dig Matthews' ballads: no worries. There's a swell version of "Grace Is Gone."