Thanks for the reply. Some other advice I've had regarding the AKG K712 is that coming from my AD900X it's more of a sidegrade (wider/smeared soundstage, less bass, slightly smoother treble). What are your thoughts? Based on this maybe something like the Fidelio X2 would be the way to go so I...

You don't think the amp in the STX would drive them well enough? It's meant to be good up to 600ohm Well it's mainly for gaming use so I want to be able to pin point sounds I guess. From what I'v read both should be pretty decent at doing this, but if the X2HR has bass that will muddy...

Use case is predominantly gaming (FPS) with some music/video use as well. Currently run an Essence STX with AD900X and continue to be very pleased with this set up. Would like to try something new/different just for a change and currently tossing up between AKG 712 Pro and Philips Fidelio X2HR...