Alright well I bit the bullet and here’s my setup.
Labtev LVA 7330 boom mic
Astro Mixamp Pro.
Planning to ‘mod’ if you will, my Sennheisers by adding the boom mic. Like this: http://www.head-fi.org/t/446329/fragtalitys-audio-technica-ad700-boom-mic-mod
Using the Astro mixamp, I will connect the headset -> mixamp -> xbox/computer.
Which raises another question. I understand with mixamps, for true surround sound you have to feed them Dolby Digital Live audio, and onboard SPDIF doesn’t do that. What would be a good option to get this going? An external soundcard? PCIe?
Recommendations for a brand would be nice, I was looking at the Asus Xonar line