jHer deer,
Thanks for reading forum. I admire you initiateve you brake up the game world audio from your sound card.
A problem with the sound card drivers so much work on the Internet, because the new Windows 7 and Vista. Sound designers have no incentive to update old products for sale, so the sound problems in Windows 7.
I think you made a good decision to select, and acoustic music selection NuForce because NuForce is bright and sharp, making a good partner of acoustic sounds, and he has the grace and warmth.
Over the headset, and AMP, but important decisions must be completed high-end cable manufacturer's instructions.
Confirm your audio cable, as AMP is too hot, you are using silver cables and make it more clear. And if a brighter sound to you, of course, use copper.
I hope you ideas and step-by-game audio world.