I'm thinking about buying a Senheiser PC155 Headset and I've been stumped on one little question about an extra feature in the headphones. If I plugged in the USB portion of the headset instead of the audio jacks, would it still work with the X-fi or would it use the onboard (which is disabled through BIOS) OR use its own little thing via USB magic. Nothing really that would sway me against buying or for buying, it's just one of those things I would like to know without me having to test it out myself.