Best interconnects used for around $500 +?

I have had excellent results with ClearDay single ended interconnects. These are all silvers, but are very neutral and musical to say the least. Besides Paul from ClearDay will send you one to test in your system, without any credit card. Just reach out to him and let him know what you would like to audition. Good Luck.

Agree with the Clear Day IC's. I own several pairs and they embarrass many, more expensive cables. They'll bring out the best of you CJ gear that's for sure. Very open revealing cables. Kimber KCAG is a very nice cable and you can pick them up used around $500, but I'd go with the Clear Days and either save the difference or pick up a couple pairs. If you can find a used pair of WyWires Silvers that's a nice step up from the Clear Day Cables, but they don't come up for sale used often. Good luck.

Try the usedcable.com lending library. I did years ago and have settled it was a great help in finding the right cable for my system.

I have been very pleased with Herron Audio cables.  I haven't had any reason to change.  That said, I have not heard a very wide variety of cables.

What interconnects are you using currently and what specifically are you looking to improve upon?