I have a X-Fi XtremeMusic right now and would like to get a nice upgrade for my sound quality. So which one would I be most happy with? I won't do any producing/creation of music at all so I doubt I'll ever use the inputs. I won't be using the Prelude for surround sound either, just headphones...

I've probably spent about 4 hours reading stuff about Amps and DACs and I'm not anywhere closer than where I started. I looked for the super-newbie sticky threads but I didn't seem to run across them and the ones I did find seemed to already be working with a beginners knowledge that I don't...