Christ, I was just starting to get acquainted with the BMPC4K. In all honesty, while I've been impressed with the resolution, the dynamic range has really been concerning me. So of course, I was on the phone trying to pre-order the URSA EF as soon as I heard the announcement.
Does anyone know where you can pre-order the URSA EF? I pre-ordered last year from the NAB floor. The AJA costs about 3k-4k more than the URSA. AJA is also a recorder company like Black Magic, so they come from a similar pedigree. We'll see how they deal with shipping dates and firmware updates.
For those complaining about the BMPC4K sensor that appears to be part of the URSA's initial spec, you'll be able to replace the sensor and the lens mount later, as described on the new site page. I love how they have rod holes right underneath the front of the lens mount and a top handle built into it.
http://www.blackmagicdesign.com/products/blackmagicursa