I use three pair of Sound Quest Pro Series Zero Point Reference Interconnect. Amazingly neutral & a really, really great price. I also used that in my main stereo between the preamp and amp (6 meter XLR) for years until replacing it with the Acoustic Zen Silver Reference. I tried lots of other pricey cables and couldn't justify the switch until I heard the Zen's, which were much, much pricier. (Results may vary in your system)
P.S. I'm looking forward to reading other responses to your question, but you may also want to look at http://forum.audiogon.com/cgi-bin/fr.pl?fcabl&1093784344 for an interesting, ongoing discussion of cables.
P.S. I'm looking forward to reading other responses to your question, but you may also want to look at http://forum.audiogon.com/cgi-bin/fr.pl?fcabl&1093784344 for an interesting, ongoing discussion of cables.