Trying to make a decison on my next investment. I just built a 1800+, EpoX 8kha+, 256mb DDR, and Gainward GF3 ti450. Running windows xp pro. How does the Audigy compare to the SB Live Value that Im using now? I listen to music 24-7 on my computer, but I heard the difference between the 2 for mp3s isnt much. Would adding another 256mb for my XP system be a better investment?