Desktop with AMD 6870 outputing Video and Sound through HDMI to an AV receiver (Sony str-dg910). I plug my AT-M50's into the receiver. I game and listen to music a lot, would I benefit from adding a soundcard and send sound via optical to the receiver? I'd assume the receiver is more than enough to drive the headphones so I wouldn't need an amp, but for the DAC and some of the gaming effects like EAX would it be worth it?
Thanks for any help! - John