I will chime to say that a fool and his money are soon parted and there are tons of audio snake oil salesmen out there. By all means, try different USB cables to see if you perceive a difference, but make sure you get a 30-day money-back return deal when you buy them. I have recently been on a foray to upgrade my IC's and PC with significant benefit to my system with gear from Silnote and Shunyata, but I have in the past auditioned both IC's and PC's with no benefit to my system so I sent them back. USB connections are a different kettle of fish. Almarg, who we can count on for solid advice, gives you the straight scoop above. Cheers.
