« on: November 07, 2012, 08:41:23 AM »
I almost exclusively use the center AF point
I am aware that if I move to FF, I will have to trade my EF-S lenses for FF equivalents.
7D up to ISO 1600, but the noise above that is bad.
These three statements tell me that yes, you want to jump to the 5D2. Skip the 6D unless you want the gadgetry.
I made the exact same choice a few months ago, and have no regrets... my 7D is on eBay right now.
The experience I've had was approximately a 1.5 stop advantage in ISO noise, and a larrrrge difference in DOF in my everyday shooting, due to the focal length multiplier change.
Do yourself a favor and pick up a fast/cheap prime to play with if you swap, like the 50 1.4 or 85 1.8, you'll be amazed in the beauty of the DOF for portraiture.