jvc-ham55x-high-quality-xtreme-xplosvs-headphones

 How do the two compare to each other Right now I can get (in Europe) the HAS4x for $32 and the HAM5x for $48. Is the HAM5X worth the $16 upgrade?

new JVC ham55x 'xtreme xplosives' headphones here. being a long time jvc fan, had to try one.  1st, some pics: (with a fostex for size comparison)         Build: feel cheap and plasticky but sturdy, typical low end jvc, can probably handle some abuse. earpads are thick and comfy...