Summary: First off I only purchased the Asus Orion headset, not the PRO version. The PRO version has a usb adapter that acts as an equalizer and supplies additional power to the headset. I bought this for use with an xbox 360 via an astro mixamp. It works perfect as I expected.
Summary: This is one of the best gaming headset that i've seen. It provides deep bass in-game as well as for music. The 7.1 virtual surround is awesome and sounds are more life-like. To conclude, the amplifier and FPS equation are also a great addition to the bundle, making the Orion Pro a great deal!
Summary: These are very good for music and gaming, but the positional audio is not as good as expected (wouldn't recommend these if you're looking for a headset that has good positional audio), however, with Asus Xonar DG soundcard and 5.1 dolby enabled, positional audio is awesome!