I'd be surprised if the DVD-Audio portion is 5.1 only. The Brick set, then the individual releases, each had a dedicated stereo layer and 5.1 DVDAExpolorer will rip 2 channel but may have to do a "get stereo downmix" if all it has to work with is a 5.1 layer.....but again, I question it.
Ooops, sorry, forgot that True Stories was already an HDtracks offering. I would have told you that both it and Naked are not really worth the effort to upgrade. For 5.1 yes, for stereo...well, a slight improvement. The 24 bits gets you better dynamics.