bassballboy: The sonic impressions indeed seem to vary quite a bit, especially for the PX200. I guess, the small earcups make the results very dependant from individual fit and earform. For myself (I also own both...), the PX100 does better, although it's still quite a bit away from proper full-size sound. Wheras the PX200 sounds rather wimpy and too pronounced in the upper midrange for my ears. Nevertheless, if you need isolation, you'd have to try your luck with the PX200, anyway, or look for something else...
Greetings from Munich!
Manfred / lini