Why should I buy floating rear rotor?

[rottenralph]

Is there any benefit to a floating rear rotor. I have polished stainless right now and have a chance to get one really cheap.

[flathead45]

if its cheap get it, but for street use its not a real asset
it cools faster but avarage street use won't over heat the rotor

[mikeLI_77]

i read also that the floating rotors also keep more of the surface of the rotor against the pads. the way i understand it is that along with it's ablility to dissapate heat better, the floating rotors are able to move slightly from side to side so when you hit the brakes the rotor will stay straight and get sandwitched between the pads completely straight so more of the rotor will actually be used by the pads. is that correct? i did notice on my old honda (<--oops bad word sorry) that when i was to hit the front brakes i would see the outer pad move from the caliper piston pushing it which would push the outer brake pad into the rotor and push the rotor into the inner brake pad. the rotor would actually bend into the inner brake pad from the outer brake pad pushing the rotor into it. Guess it was supposed to do that. Is that how the stock calipers on the sporty work? or is there two pistons on either side of the caliper which push both brake pads in at the same time?