Matt,

Any quality RCA cable will do the trick really. XLR is designed for long-haul transmission or pros who run into situation with high level of EMI can not be avoided. Besides, unless you run end to end XLR (which I plan to do), you would be wasting your money anyway.

If you decide to go with XLR anyway, just make your own if you are handy with soldering. This is what I am using

Canare L-4E6S Star-Quad Microphone Cable $0.50 per ft
Neutrik XLR connectors $5~6 per pair

Cheers

Howard