JackM: Funny how these fools regard 1-series AF as an incremental upgrade. No, incremental would have been the 7D AF. A significant upgrade would have been the 45 point AF from the 1D4. The fact that the 5D3 has the 1DX 63 point AF module is nothing short of wonderful. We have not seen such a well-rounded Canon since the film EOS 3. I've had a 30D, 40D, 1DIIN, 5DII, 7D, and now the 5D3. The 5D3 is the best yet by a significant margin in every regard except for 2 less fps. I will have this camera for a long time.
Having just got a 5D3 and sold my 1Ds MkI which I had for 7 years I am hoping I'll be happy with the 5D3 for another 7 years!