EDIT: Boy, I feel stupid... No sooner than I posted this, did I think to check the 'equalizer' in iTunes. I usually have it turned off, but I recently let my niece use my computer. It was turned on and set to 'Rock'. Now I have to rest my ears and give these another shot. I signed up here to...

For iampivot -- after you've had it for a few weeks, how do you like it now? Do you feel that you need more for your HD600's?