Clean and thin sounding interconnect?

Bear Lab silver Lighting.

We also have a tube system, and the most transparent cables we have found are either the Verastarr Silver Reference (or Signature) or Z-Squared Au/Au, with the Verastarr's sounding the cleanest. I would describe the Verastarr's exactly as you did in your post. The Z-Squared cables have a little more body in the low mids.

Every other cable I've tried, and I have tried at least fifteen at or above your price range, veiled the highs. I have not heard the Signal Silver cables, but their Analog II does not sound transparent IMO. The AU24 was as described by Stehno, but to my ear it did not fit your stated requirements. And it too smoothed over the highs in our system.

We have a SET amp with 104dB horns, so transparency is our goal, FWIW.

I have had very good luck with E-ticketcables. The price is cheap, and the sound is excellent. Best money I have ever spent.

I have just changed to the Silent Audio Apollo A. It will fit your budget with a lot left over for music. The most detail that I have ever heard.
(I use them in a $60K+ system)

They are available on this website from the manufacturer.

http://www.silentaudio.com

Richard

I think you would probably love the cables from Grover Huffman.