Sound Blaster X3 Hi-Res External USB DAC and Amp Sound Card with Super X-Fi Holographic Audio, 7.1 Discrete Surround and Dolby Digital Live with Line-in and Optical-out for PC and Mac :
Creative Sound Blaster Omni Surround 5.1 USB Sound Card with High Performance Headphone Amp and Integrated Beam Forming Microphone (b01bd7e6a2bc98c8d91d1f26f4729196) - PCPartPicker
Sound Blaster X7 Limited Edition - The Biggest, Baddest, Boldest Sound Blaster Ever: The Ultimate Sound Companion for Pro-Gamers and Audio Enthusiasts - Creative Labs (UK)
Sound Blaster X4 - Hi-res 7.1 External USB DAC and Amp Sound Card with Super X-Fi® and SmartComms Kit for PC and Mac - Creative Labs (UK)
Creative Sound Blaster Play! 3 USB External Sound Card LN133171 - 70SB173000000 | SCAN UK
Creative Sound Blaster X4 External USB DAC and Amp Sound Card - AX STORE
Sound Blaster E5 - 24-bit/192kHz High-Resolution USB DAC & Portable Headphone Amplifier | Headphone Reviews and Discussion - Head-Fi.org
Sound Blaster X3 Hi-Res External USB DAC and Amp Sound Card with Super X-Fi Holographic Audio, 7.1 Discrete Surround and Dolby Digital Live with Line-in and Optical-out for PC and Mac :
Creative Sound Blaster GC7 USB Super X-Fi DAC Amp Review | Overclock.net