is it worth swapping 10.7 inch discs for the 11.8 inch?

I did the swap, it isn't a big difference on a flat road but I live on a steep hill and they run a lot cooler at the bottom. Would I do it again? maybe. But first I'd use a better pad on the calipers. EBC makes pads that are much better then the run of the mill stuff available over the counter. Try them first (they are a tad expensive ) and you might not want to add the extra weight of the 11 3/4 rotors. The pads will wear the rotors more then stock pads but they do stop!