I would have to second the statement of "bird in the hand...". Unless you are well established on one of the forums getting a proxy can be frustratingly difficult. The price on the Boss Streets rivals that of some of the releases from five years ago. Do better deals come around? Possibly. The High Streets is such an example but is the exception rather than the norm as Busse made them as a new way to sell off blades cut for a different design. I am pretty sure it was only available at knife shows.

Considering how nicely the Boss Streets fits your stated criteria, and that its being released at a pretty decent price, I would certainly recommend jumping on it. The ss4, which does not fit better with your criteria, is now being sold, often at least, for more than the asking price of the Boss Streets.