On the side I am saving up for a Canon 7D.
Why? Hopefully only as a backup to your 5DIII. The only reason I can see to choose a 7D over a 5DIII is if the latter is broken.
For for more reach.
Although, granted, for soccer/football I don't think the 7D AF is maybe good enough to give up the 5D3 even with the extra reach.
For surfing I think the 7D definitely has AF good enough to be worth the extra reach though. Same for birds sitting around and moving about a bit (where it almost seems to do better anyway).
The 7D2 though might well use 5D3 AF or even better.