If you are thinking about buying the HP100/150 but haven't yet, I recommend that you don't. The sound quality is great, but I have owned the headphone twice and both times it has snapped at the top of the half-circle that connects the cup to the headband.
Both pairs were owned for under a year, both were babied and not dropped/sat on/etc. once. I don't have an exceptionally large head or anything.
If you plan to use your headphones for more than an hour or two per day, I don't recommend buying these as they are extremely fragile.
This is the area that consistently breaks:
For you. Others aren't having this problem. So what is the common denominator in addition to the headphones