NikKTech reviewed the Creative Sound Blaster X5 Hi-res External Dual DAC USB Sound Card
A quote from the article:
It's been almost 9 years since Creative released the award winning and highly popular Sound Blaster X7 External USB Sound Card so I really wanted to test and see whether or not their latest Sound Blaster X5 model was worth the wait.Creative Sound Blaster X5 Hi-res External Dual DAC USB Sound Card Review