Answer, courtesy of Google Gemini:
Wireworld Eclipse 8 Biwired Speaker Cable (2.5m/Spades): ($2,450) These offer pure Ohno Continuous-Cast copper conductors and OCC Silver Tri-Helix technology, known for clarity and detail. However, they might not provide significant high-frequency damping.
Kimber Kable Carbon 8 Speaker Cable (4.0 Meter - PM33 Spade to PM33 Spade): ($2,200) Features Kimber’s proprietary carbon-based conductor technology for a smooth, natural sound. Their "warm" presentation might offer some high-frequency taming.
Audience frontRow Center Channel Speaker Cable; Single: ($2,475) These cables utilize proprietary VSF conductors for detail and neutrality. Be aware, their neutral character might not emphasize high-frequency damping.
Venom-X Biwire Speaker Cable (Pair): ($2,500) These employ a braided geometry and silver-plated OCC copper conductors for clarity and dynamics. While detailed, they might not specifically tame high frequencies.
Some Cardas cables, particularly their higher-end models, are known for their warm and smooth sonic signature, which might be desirable for taming the upper frequencies in your setup. Some Cardas cables can be quite expensive, exceeding your $2.5k budget.
My answer: buy used.