Does High End In Wall Speaker Wire Exist?

So I'm in the process of reconfiguring my system after a recent move. My plan is to run a 25' pair of speaker wires through the 1st floor joists from my Sophia 3s to an equipment cabinet across the room. I'm trying to achieve a very clean and uncluttered look and avoid having anything between the speakers. With that in mind, I'd like to use in wall speaker wires that will do the Sophia3s justice. Any recommendations? Less than $7k please.