I just bought a black DacMagic about a week ago and I'm really enjoying it so far. It's a very significant upgrade coming from my Auzentech Forte sound card. My speakers are KRK Rokit RP8G2 studio monitors, which I bought for music and not for mixing. Before getting the DACMagic, I wasn't completely satisfied with my Rokits because the sound was a little too harsh and brittle. They were fatiguing to listen to, especially after 30 minutes. But the speakers were brand new so they had to go through some burn-in. After switching out the Forte for the DACMagic using 3ft balanced cables, the differences were immediately apparent. The sound became more transparent, and for once I paid particular attention to the instrument separation, which there wasn't really much of with the Forte.
It's been five or so days since I hooked the DacMagic up to my system, and with each listen I get more impressed. I've never heard such a degree of clarity coming from one of my home audio setups. As more times passes, I noticed my music is sounding more laid back and musical than ever. The speakers don't even fatigue my ears anymore (at all). They're laid back enough to fall asleep to. I'm sure the differences will become more apparent as both my speakers and DacMagic acquire more burn-in, but as it is, with around 20 hours of burn-in on the DacMagic, I'm satisfied. I was worried I wouldn't hear much of a difference at all, because I couldn't really find anything to compare the sound quality of the Auzentech Forte to the DacMagic. So if anyone else was considering upgrading from their sound card but wasn't sure if it would be much of an upgrade - trust me, it is.
I just wish I had an amp for my Grado SR-225i headphones, so I can test those with the DacMagic as well.