Glad to hear you found a solution to complement your system.It takes a lot of patience and tweaking to dial the treble in just right.It doesn't make it easier that there are so many recordings accentuated in the higher frequencies.
Mrtennis, yes the Purist Audio Colossus is pretty rolled off. I had a pair of ic's that leaked the blue goo. I would call them rolled off and closed in leaning more toward dark than warm.
Belden 1313A is 10 AWG OFC design that is exactly what you elude to wanting. It should be very affordable. Grab some crimp then solder spades and your set.
This cable has a very full sound and is not bright by nature, but still is decently coherent up higher. Bass is great.
Give the Chinese YYW speaker cables a go , you can pick up a 2.5 meter biwired set for under $150.00 , great budget cable that won't be out of place on a modest hi end system .
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