No, you won't need to amp the CAL's :) Now, I haven't heard the CAL's but from what I'm reading, they aren't too isolating. You should check up on that, although I don't know how important that is to you.

So I've decided to get a new pair of headphones, I currently own the B&W P3, but i am not satisfied at all, mostly due to the the mids being to excessed for my liking. My problem is that I wanted something for commuting, as well as home-use, and i can't find any can that meets all of my...