Speaker Cables - 15 Ft. or "No Wife"

Due to the W.I.F.E. factor, I have to run my Manley 300Bs with 15ft speaker cable to my Coincident Super Eclipse speakers (the things we do to stay together). So, I am looking for a good speaker cable that: A) Will sound great at this 15ft length and B) Will not cost me more than $1000. I have to biwire, so please keep this in mind when making recommendations. And a D.I.V.O.R.C.E. is not an option... yet!