agree with the not-cotton! I'm happy to pay more for a hoodie that is a little more technical. For years I've worn the burton bonded hoodie as a mid-layer. Its been good to me. I'd love to see what you can come up with, as would many other forum members I'm sure.
Also, and I'm not sure how to describe it. I really like hoods that are sewn so that they don't stick up in a point when they're on your head. anyone else agree with me on that one?