Thanks, I guess the 80-85C would be good, but that's a 3 pin and I need a 2 pin. I can probably just use the pins for that setting and ignore the other. I wonder what kind of current these are good for, my fans draw 8A ea.
Another option would be to install the fans on a relay and use a different temp switch altogether, it's easier to find low current temp switches.
Cold weather coming anyway, I bet we'll be discussing how to keep em warmer in a few months!