Am I alone in the opinion that the CAL!'s are a bit harsh in the treble dept.? I always found that I'd get to my favourite part of a song and whack the volume up, then immediately turn it down again as blood poured out of my ears! (That's a little over exaggerated but you get the picture.) That V shaped signature does suit some tunes well, mind.
I do concur, however, that they are extremely comfortable. They weigh nothing and you can forget they're on your head. They won't be falling off, either.
I certainly don't find them harsh, but they are a little bit on the bright side so it's a fair statement that loud listening volumes with bright tracks would bring harshness.