Here's 3 suggestions. Denon sound the best and most comfy. Ultrasone are an excellent deal if you can find them under $150 (Amazon has them right now), very fun headphone for your purposes.
Ultrasone Pro 550
Creative Aurvana Live
Thanks for the replies all.
So with the Senns being out due to open back what would you suggest? Looking for closed back, long session comfort (excellent at the moment with my siberia v2), and decent music and game performance. Really looking to hear the rumble and guns of the tanks while listening to a wide variety of music, and occasionally jumping over to Battlefield 3 and listening for that helicopter position overhead.