I'm looking for a USB soundcard with a quality DAC that has a mic in as well. Mic quality is not really a concern, just for multiplayer gaming. I use headphones, and I already have a headphone amp. I've seen the ASUS Xonar U3 or the more expensive FiiO E7 thrown around a lot, but because I already have an amp, I wonder if that makes any of the more expensive options less relevant.
Also this is for a desktop so it doesn't need to be portable. My integrated sound broke, plus my rig puts out a lot of EMI, so I figured it was time to go external. However, would using optical+DAC have any advantages?