I just want to add my comments to Ray's. Now that I'm accostomed to the better brake performance from the bigger rotors, I just can't imagine going back to the original size. The difference is significant.
My subjective opinion is that the braking has improved in the neighborhood of 15% to 20%. I have no test data to support it, just my feeling.
And I only have the fronts. I'm really looking forward to getting the rears done too. I know the rears won't make nearly as much difference, but it will sure look better to have something that isn't as wimpy looking as the stock rears.
