If that is too cheap, then Analyisis Plus has the Theater 4 (four 16awg conductors) which they claim is for long runs. It is $9 per foot.
Or try the Analysis Plus Clear Oval at $8 per foot. The Clear is a 14awg version of the Oval 12 (12awg).
I used a total of 100 feet of the IXOS 6003 for 5 channels, so with terminations, $200 was better than spending $1000.