Go with the double disc!!! There's been a bit of a debate on the topic of whether or not a live disc should be one show, "warts and all", versus a piecemeal of the best versions of songs from throughout a tour.
My vote would be to do a double disc that takes the two best "halves" of sets from tours. I've been to only one Joe show, and he didn't have a break in the middle of the set, as some bands do. If he did, I would want to see the best half-set of a recent tour, then a great half-set from a few years ago that may have contained some live rarities that Joe doesn't do much anymore. You still capture some momentum of a complete show on one disc, but get a little variety.
My honest opinion is that I'd rather not get a double-disc of a complete show that I already saw. I'd like to see a DVD of a show with some stuff I didn't see in the show I attended. I like the variety and in some sense a career retrospective.
Either way, I'm hoping the DVD includes his cover of Just Got Paid. Thanks, Joe. Hope it comes out soon!