Creative Sound Blaster X4 Hi-Res 24bit/192kHz External USB DAC and Amp Sound Card, Super X-Fi, Multi-Channel, 7.1 Discrete Surround, Optical-in, Optical-out, Line-in, Mic-in, Headset-in for PC and Mac : Amazon.co.uk: Computers &
Xonar DG|Sound Cards|ASUS Global
Testing high-end sound card: Can EVGA NU Audio set new standards in the lab? | igorsLAB | igor'sLAB