Nordost Heimdall, Stealth Hybrid MLT, Mapleshade Double Helix plus or Tara Labs Air 1 should do the trick. The Stealth would be my reco, but you may not find a pair under $1K, unless you get a great deal or are using shorter lengths.
I currently own the AZ Satori Shotgun speaker cables that Soix mentions. While I would agree with the natural sound, I do not agree that they are neutral and transparent. That is a good thing from my point of view, I sold my pair of Nordost Heimdall when I acquired the AZ SS.