Q: Why pay to listen to Walk the Line, an album on which Joaquin Phoenix and Reese Witherspoon channel Johnny and June Carter Cash? A: Because it's better than you suspect. Produced by T Bone Burnett (O Brother, Where Are Thou?), these new versions of beloved oldies ring surprisingly true. No, it's not Johnny and June, but a credible simulation. If, combined with the (quite good) film, this inspires new fans to check out the originals, a higher purpose will indeed have been served.