Upload & Sell: On
What's the problem? I don't know about others, but I buy gear for what it will do for me, not for what it won't do for me.
You need fast frame rate, reach and the like? 7D. You need low-light, full-frame, etc? Get a 5DIII.
If you need one, but find you've bought the other, then switch.
And if you need all of the above, then save your money for a 1DX.
Compared to what we could get a few years ago, both 7D and 5DIII rock. And in a few years they'll be considered doorstops. That's life.