Ive always gone with the reccomendation of best on the rear. Last winter, after reading and watching a lot of discussions on the topic I decided to test the opposites, good on front.
Hit black ice on the road at 50km/h(on a 80 road) and lost traction on all four two weeks later. Ended up rear down the ditch on the opposite side of the road into a snowbank. With a small tug I could drive it out and no harm done thanks to the snow.
What happened was that the fronts gripped before the rears when speed came down, flipping the car around. With the climate here its not the first time I have lost all four, but the first time I ended up off the road.
Shifted back to the good tires on rear the same day, scary experience, Im lucky there was no oncoming traffic at the time. Nedless to say, my good are always gonna be on the rear, if breakng is bad its due time to replace them(shifting the rears forward and new ones on rear).
Whats best in hotter climates I dont know, but in the cold I do know I would never have the better tires up front.