Okay, I'm a little bias for AKG.  I already have the AKG Q701, which I use daily and for hours at a time.  The sound is good, but not as good as the Q701, but then I wouldn't expect it to.  These are semi-open, so it's not going to completely block the outside noise, or keep your music from leaking.  The bass is shy and the highs rather harsh, but its still a good entry level headphone for less than $100.