I have a DX1. It sounds ok straight out of the card but much better when using the optical out into my receiver. Problem is: to use the optical out I have to disable the microphone. Not acceptable. Knowing that the game is coded for 48hz, what current sound card would be the best for me? One with separate optical/coaxial out and mic input into my receiver or one with a better dac than my DX1 for use without the receiver?