Recommendations for Balanced Interconnect...

I'm looking for a balanced interconnect to run between my Electrocompaniet EC-1up CD player and my preamp, which is currently a BAT VK30 (soon to be an Aesthetix Janus). Both preamps run in both balanced and single-ended modes. Want to make the most of the pre! Price range: used, no more than $300. Sonics desired: detailed but somewhat warm, definitely not aggressive.

Amps currently in use include Odysee Stratos Dual Mono and Quicksilver "Triode" monoblocks. Speakers include Proac 2.5's and Quad 988's. System not yet locked in on either account. Thanks for good advise!!!