Audioquest Argent? Midnight? Sterling?AudioTruth?

Yah Quite a bit if your picky! I used both in a side by side bi-wire and on occasion i flipped em back and forth just for curiosity. The Argent is a much better all around cable with more inner detail and better ( cleaner ) mids and highs. I also found the Midnight ( lows ) Argent (highs)
bi-wire was a very ,very good combo. Using the midnight on the lows save you the cost of the more expensive Argent.If for single wire only the Argent is the way to go..Just my opinion.

I'll second every word of what Thorman had to say, as I'm still using an Argent-Midnight cable set to biwire my main speakers. I haven't used Argent in a single wire setup, but I reterminated a pair of Midnight biwires to single for lows and added Argent for highs and this was a noticeable improvement over the Midnight biwires. Hope that helps.

Thorman very accurate,the Sterling is better than
the Argent.The Dragon is the best actually.

I had Midnight & Argent combo, then changed to Sterling & Argent. Argent gives you more tonal quality right through the musical scale. Midnight gives slightly more bass weight.
But, yes, Midnight/Argent combo is very good; but the Sterling/Argent combo is better.