I'm on my 3rd set on my FZ6R and love them. They work great for me here in Florida where it's always warm. Up there in the land of good beer on a hight HP bike, not sure. Combo of cold weather and rain might not be your best friend with the Conti Motion. Compare to the PR2 the tire is less round. Make it more stable on the flat slab but doesn't lean as quick.
So what I'm trying yo say is if you are a moderate rider riding the freeway most of the time the Conti Motion is right for you. If you are a bit more aggressive and like to hit the twisties every weekend, I will suggest you to go more with a PR2 or PR3.
Like I said, the C-M are great for me in Florida on my 80HP bike. Not sure about adding another 50-60 HP how they will handle it. But there's only one way to find out... like you said, they are cheap.