I know that there have been many threads on this topic (at least, the non "i" versions), and although I am not in the market for either pair of 'phones (I own the Sr225i's), I have a question.
Most people claim that with the old 60's and 80's, the only difference were the pads. The 60's have comfies, while the 80's have the better bowls. People have said that if you put bowls on the 60's, then they become 80's. The price difference between the two 'phones is actually equal to the cost of a pair of bowls, so go figure!
Now, the 60i's and 80's both come with comfies. I know that the 80i's have destressed drivers, and 8 cables, but do these small differences make a big enough difference between the two "i" models?