It's too bad there are no manufacturers building amplifiers with the NC400 rather than the NC1200. I think there's a market for the lower end who would prefer a finished unit rather than picking up the soldering gun and drilling holes, regardless of how easy it might be. For example, while I certainly *could* put together a PC myself using readily available parts (motherboard, hard drive, case, CPU, memory modules, etc), I'd rather buy from Dell, HP, etc.
When I last exchanged email with Dusty at Channel Islands a few weeks ago, he said he had no current plans to adopt the NCore line and he was sticking with UCD for the foreseeable future. Of course, he may have just been playing coy.
Perhaps the NC1200 OEM pricing is only slightly more than the NC400 direct to consumer pricing. That would certainly explain things, although wow, that would be quite the gross margin we're seeing on NC1200 based amplifiers.
Once the NC400 modules are no longer back ordered, I'd expect someone surely will start buying NC400 modules and sell finished amplifiers, perhaps building them as a side business in their spare time.