My 12FET 4110 controller at 70A was ready to blow while running 40-70 amps continuous.
My 12FET 3077 controller at 80A remained fairly warm doing the same thing, but the battery cables were always very hot. The controller died when i botched upgrading it, so i got an 18FET 4110 and everything has been peachy, even at 20S Lipo x 100A.
Do keep one thing in mind though.. i run 120% mode most of the time on my 4T. This will add extra stress to any controller.
If you ran a 5T motor and higher voltage ( up to say, 70v fully charged? ) on a 3077 12FET, you could certainly get away with it.
At 72v x 80A, this motor is very dangerous in terms of wheelies on my mtb.. and i'm probably 30-50lbs heavier than you.
My rim has held up great, but the wheel was not properly trued from the factory. I ordered mine with a 24mm rim that looked cheap, but has taken everything i've thrown at it... i had the wheel trued immediately upon arrival.