I'm looking for a budget (< $100) USB sound card for hooking up my laptop to a Corda HA1. That's the *only* thing I'm going to use it for; I don't plan on ever carrying this around while traveling, or trying to run headphones directly out of it. So, I'm hoping to maximize audio quality by being...

I've had my Beyer DT250-80s for a few months now and like them a lot... I find the tonal balance to be quite pleasing and fun to listen to on a good variety of music. However, after trying a friend's AKG K501s for a while, I'm thinking of getting another pair to supplement (or possibly replace?)...