What makes DR 7 special?
Well, the DRs are single-batch, high-gravity (strong) brews that are--at least as I understand it--intended to be stored and sampled over time. I've only tried a couple of them, and while they are fun and interesting, I wouldn't call them must-taste brews, at least for most folks.
That being said, I went looking for some of the #7 today at the Kroger at Montrose near Westheimer in Houston and no luck. I had no problems finding the last couple of versions there. I don't really feel like trekking all over the fair city hunting it down, so if anyone finds some and would be willing to trade me a bottle for a bottle of the #5 or #6, PM me. I'd be happy to meet you anywhere inside the loop. [ETA: Homicidal maniacs excluded, but that should go without sayin'.]