The KRK KNS-8400
I see this headphone is getting some well-deserved popularity here.I bought mine absolutely blindly(I like KRK monitors) to be honest.Currently I'm very satisfied.
Reviews on Head-Fi:
http://www.head-fi.org/t/526400/krk-kns-8400-review-impressive-150-headphone (from tdockweiler)
http://www.head-fi.org/products/krk-kns8400-studio-headphones/reviews/5894 (from R-Audiohead)
Apart from music,with this headphone,yeah,you can monitor.I've heard:
-A bird singing outside the concert hall(!)
-Coughs and sneezes back there
-Various movements,clanks noises,squeaky chairs
So it's very revealing,sometimes too much,but I thinks this is it's purpose.Tracks with too much hiss do not apply.