Hello Epc2,
I think you can get away with 700's and 105's without any issues. I am running 696 and 106 right now. Not sure about the 710's though.
As far as motors, I've tried probably the most powerful one out there. The new KDE 495kv motor. There are zero issues with gear stripping. The main gear is a 12 mm thick, 116t, machined, helical main gear. It runs ultra smooth and is incredibly strong!
Hope that helps!
Matt