Look to the companies that sell direct and offer a 30 (or 60) day money back return policy. Signal Cable, Morrow Audio, MAC (My Audio Cables), and a few others that escape me right now. I've tried Signal Cable and really like them. I prefer them to IC's I've tried from Audio Art, Tara Labs, Kimber, and Straight Wire.
That being said, my personal trend lately is to build my own cables. I just finished one that's designed like the Kimber KCTG that cost me less than $25 to make. I definitely suggest giving Signal Cable a try; I haven't been able find a way to piece together a reasonable facsimile of their cable for less than they sell them without buying enough supplies to make over 100 cables.