I've been doing a bit of research and I think either of these headphones would fit what I want at the price point I'm looking at. I just am not sure which one I should go with.
One thing I dislike about the WS99 is that the cable isn't detachable, but it does have an extender so as long as I have that on I shouldn't have to worry about the permanent connected ends being tugged on. The WS99 also has bigger drivers at 53mm. From what I've read in reviews they have a good bass presence without being over emphasized, which is what I'd like.
With the HDJ 2000 set I've read that even thought hey are supposed to be DJ headphones they actually have a good hi fi sound to them, and like the WS99 have good sounding bass without it being over done. These have smaller drivers at 50mm. They also have a larger frequency range, but the extended range is beyond what is considered the normal hearing spectrum for humans so I don't think it really matter.
Unfortunately I have no stores in my area to test either of them at. My local best buy has the HDJ 2000, but they are not on display to test. I find that sad because they have every model and every color of beats on display for test >.>