I don't like the Corsa III, they wore out after just 2400 miles on them, they also have a very slow turn in..... I would not buy them again. The Conti Sport attack, and the Pilot power have very similar profiles. They are the best tires that I ran on my bikes... I've try them all out there. I would also say that the M3 would be the third one on my list. Just my 2 cent.
Oh boy. I can see this may turn into another tire war thread. :lol I've ran about all the brands out there. My choice is the Bridgestone BT-002RS. Great on the track and awesome for very hard street riding. Although, they will not last as long as the others due to them being sticky. For good all around riding on the street with some hard curves thrown in and great mileage wear the Pilot Powers are great.