I am super happy to see this released. It makes the rumored Canon 6D(maybe not with that name) that much more realistic. Canon 5D Sensor, 7D AF system and 7D body/controls. Looking to be ~5 FPS. This becomes the perfect 3rd body for motorsports. Retire the 5D. Get 7D AF system so cool ultra wide angle panning shots become easier.
And priced around 2K body only. I am sold.
The D600 looks stout though!