Upload & Sell: On
I shot those two bodies side by side for a day with my 500 and they both make beautiful files. I ended up with 1D3 for the faster buffer/frame rate, the dust buster, and for MFA.
Granted, I have too many lenses... But my MA adjustment is between 9 and -8 on 1D3 for my entire glass collection, so MFA is super useful for me (as is FoCal).