The gun snob in me says that I don't think I would ever pay that kind of money for anything from Kel-Tec. A DPMS .308 is priced less.
However the concept is damn cool and if you're going for the bulpup aspect of the package, I'm pretty sure it's in a class by itself, I've seen a couple bull pup .308s but IIRC they've all been bolt guns.
If you get one, double up on your ear protection, muffs over plugs as that puppy is going to bark. I'd probably opt for the longer barrel just to keep the muzzle her away from my ears.
I think with a good optic that would be a nice package for an urban combat rifle. I'm just not that crazy about Kel-Tec but Kudos to them using readily available mags (unlike FN with their FNAR) for the gun.
I wonder how it handles in the prone...