I just got a Monster Jamz off amazon and I think that it really has a great quality. To start with, the build quality is amazing as they are boasting of an almost indestructible case. They have a video on their product page that showed it being hammered and not a single dent on it. Now that's amazing.
I do not have the guys to do that though, probably after a couple of years, I would test that on my own.
With the sound quality, the sound is great on bass. and excellent on mid range and treble. It's tag price is at 119 but I got it for 49, thanks to discounts.