I have a 9mm EMP. It is a fun little pistol, but it will never replace any of my normal-size 1911s. The reduced size is nice, but I prefer the fit of a full size to my hands. And for a small increase in size I can have a .45 instead of a 9mm with about the same capacity and recoil.
As to the cost, we'll never see a $600 EMP; it has too many proprietary parts. Those itty-bitty parts require special tooling that just costs too much to be amortized over the few number of guns sold. If the EMP should suddenly become as popular as 1911s, then we will see the price come down.