DCCA cables are great and they have the full, warm sound it sounds like you are looking for. And they have a 30 day money back guarantee. Just tell Don at DCCA *exactly* what sound you are looking for, and he can tailor the cable to your desires. He can increase their treble extension if you want.
The Fusion Audio Predator is an all copper foil cable which sounds fantastic on my amp. It's copper, so it doesn't exhibit any of the leaness you get with silver. But because it's a foil based cable, it's extremely fast and extended in the treble. It is very neutral and transparent, however, so if you have any lean sounding cables elsewhere (ie silver interconnects), they will not be masked by the Predators. The more expensive Fusion cables contain silver, so they may not be what you're looking for. The Fusion cables are available for audition for $20/2 weeks, and I have heard that they outperform the lesser priced Tesla power cables.
Tomer