A friend of mine uses CAST cables he had made by Tara. The difference is impressive and noticeable. You may not have to go all the way up to "The One" to achieve the improvement you seek.
Did Tara quote you $3000/meter for a single CAST cable? That seems a bit high as The One XLR interconnects sell for a bit less than that (as of last summer) for a pair. I'd call them back and ask them to clarify their price to you. (I'm not a dealer).
Did Tara quote you $3000/meter for a single CAST cable? That seems a bit high as The One XLR interconnects sell for a bit less than that (as of last summer) for a pair. I'd call them back and ask them to clarify their price to you. (I'm not a dealer).