Have you considered the Redrock M2 Encore? It seems to be one of the best out there in terms of light loss and edge-to-edge sharpness. After using a letus extreme and ultimate a couple of times, I eventually settled on the M2e... I have been extremely happy with my decision, and the thing works flawlessly.
Happy with my Blade. I rented a Letus Ultimate and the build quality was comparable. My only nit to pick is the battery compartment is a little flimsy compared with the high end Letus. I like that you can change focusing screens. I've heard (but have no personal experience) that the Extreme is not built as well as the Ultimate.
I've not had any of the CA issues you may read about in other threads, but--to be honest- I could barely make them out in the footage where people said it was annoying. Customer service was excellent from Wayne and Shoot 35.