In my system the Frontrow USB sounded excellent. Really great detail retrieval, lots of treble energy and air. I wouldn't call it bright though I could see how it might not be an optimal fit if a system did tend that way already.
After comparing a bunch of USB options my favorites were from Pink Faun and Veritas Cables. Basically tied for first place with the Veritas Audax being the better value. Audience Frontrow was second place, Clarus Crimson was next, and the other models weren't good enough to place at all. I haven't tried the Stealth though.
