Im looking for the exact same thing just now. Ive spent the past few weeks looking around at whats on offer. I was thinking of getting the custom Audioquest Carbon with the Telegartner connections if I was buying new. Seems the best value for a new cable at £94 for 5% Silver content. Other than that Ive been looking for 2nd hand to see if I can get a better spec.
I've found the Supra ethernet cable to be the be the best and it beat cables 4 times the price. All of my friends who have heard it in their own system have bought 1 or more. They just do everything right.