I saw that the Nikon D600 has a crop feature where you can move down to 10MP and get the extra reach offered by an APS-C camera.
Is it possible the 6D could be a 7D replacement that matches or exceeds the current 7D in crop mode, but also provides for a full frame mode?
I would like to stay with APS-C primarily as I do a lot of sports and wildlife photography but I would love to have FF where speed and reach or not required.
Is this too much to ask? There are some great deals on the 7D right now but I feel reluctant to pull the trigger, mainly because it's low light performance isn't that much greater than a Rebel. If I didn't have a Rebel, then buying the current 7D would be a no brainer, but as I have a Rebel there is still a significant premium to upgrade to the 7D when you factor in the low resale value of the Rebel.
It seems the only real advantages of the current 7D over the latest Rebel is the FPS and the focus system, but even there the latest Rebel has closed the gap.