I third the Blue Jean cables. Properly impedance matched, well shielded and quality build.
The cable used for these is designed for data transmission and at rates that well exceed current audio data requirements. I like to keep mine at least 1.5M long to prevent early reflection from entering the data path. Some will say that it is unnecessary at the data bandwith of audio but it can't really hurt. I'm from the computer data transmission world and it's mandatoty there so following tradition just gives me the warm and fuzzy.