Its interesting to visit the Kohs website and read the posted updates on the BB project.
I can understand why folks, with the discretionary funds, pre-order Kohs items. As they are built to order, and in relatively small quantities, they are very hard to find on the secondary market.
To some degree, this is also true of 3rd Rail/Sunset as well. Interestingly though, they don't require any down payments, although I realize their offerings are priced at about half or Kohs items, so I understand they are carrying less debt on a project than Kohs.