Zu Dirty Weekend 6 went on sale today

The good folks at Zu certainly know a thing or two about creating hype around new products. The Dirty Weekend 6 went on sale this morning. It was positioned as a first come first served release with a November delivery. I bought a pair with the "supreme" upgrade. A little risky buying without hearing them first, but I figure I can probably unload them if they're not to my liking, since they'll probably sell out. Any thoughts on these or Zu in general for that matter ..