Hi all, I'm going to purchase (sometime in the near future) a sound card for my PC. I'm looking at a fairly high end one, but just wanted to know, when I get it, can I or should I, still use the USB DAC/AMP that I got with my Astro a40 headset, with the optical cable for audio, or will I get higher quality audio with the headset plugged straight into the sound card? Following on from this, if so, would another, higher quality, external USB DAC/AMP increase my sound quality further, or would it make no difference. I'm thinking of buying a Creative Sound Blaster ZxR sound card, in case that makes a difference to the answer I'll get. Cheers.