The Sony NEX FS700 – 4K for $8k
I don't know. It will record 4k, but apparantly only to an external recorder. How much is the external recorder going to cost? Will it be back into the Red Scarlet price range with everything needed to shoot 4k?
On the plus side, it has ND filters included, great for shooting outdoors. It's less than the Canon C300 and does 4k.
As always will need to see footage first, but sounds like a nice cam.
I'm not a fan of the E mount, but you can get adapters.