Nissin has been quite aggressive with their flashes these days, and a new one just came on the market, the Di866 Pro. From the looks of it, it has all the makings of a flash that strobist would use.
This is a link to their Japanese website, and here is the Google translated version.
From what I can tell, it is a powerful flash. The guide number is 40 @ ISO100 and 35mm. This is more powerful than the Nikon SB800 or SB900. It has a PC sync port, manual power adjustments to 1/128, and even Nikon CLS. From the manual, it can be a CLS master. This is one flash that is trying to take the place of the SB900.
At the time of this writing, RedDotPhoto is selling it at $410, which is a really good price if it works as it should and if the flash output is consistent and reliable. Here is a link to the quick manual and here is a link to the full manual.