[lkramer]

I am looking to get a discrete sound card because I am tired of listening to the crappy on-board Realtek sound chip through my Sennheiser HD 580 (modded with HD 600/650 parts). I am currently building a headphone amplifier for the headphones. So, the sound card does not need an amplifier on it. I will mostly use it to listen to music, but I will play the occasional game.

Which sound card is best for me out of the three listed in the title? I also open to other suggestions for sound cards that are up to $80.

Also, I does the able to swap the op-amp make a big difference? Or should that be lower on list of pros and cons of a sound card?

Thank you in advance for your advice.
Larry.