From what you've said & "EastCoast" said,Toronto Busa, I tried them all and here's my 2 cents:
M1's: When you get to the point of having 35 to 40 percent of the the tread left they tend to slip more (Twisties) this is on dry and wet roads. When I tried them on my busa I put them on my duc and zx10 as well all of the bikes had the same feel when the tire was in it's 35-40 % usable tread life.
Diablo's: Same tire (Perreli owns Metzler) but for some reason the tire felt sticker wet and dry a lasted longer about 15 to 20 % longer on all of my bikes. No complaints but I wanted to try the Powers!
Powers: The busa was the first to get them, had to relearn the bike not only did the bike dip faster but going side to side was faster and the stability factor went way up both on wet and dry. Very fast warm ups excellent stopping power never did a stoppie before, until the powers that is. Much longer wear 4500 front and back. All of my bikes have them now the zx10 wears them out the fastes around 3500 don't understand why since it's a lighter bike.
Sounds like the powers are the way to go.
My front is still in great shape, so only changing the rear.
I assume that's O.K. (I know both new would be better, but this thing eats rears!)