a better interconnect cable

First off, consider what you have and where you would like to go. If you want more bass, go with a cable that has conductor of larger diameter than what you have and if you want more highs go with a cable that has a conductor of smaller diameter. As for details and speed, to get more you need a cable with a lighter dielectric, look for some dielectric that introduce air around the conductors. As a DIY cables enthusiast and micro manufacturer, I make IC cables with 20, 22 and 24 AWG OCC copper, each rendering a slightly different tonal image  with the 20 awg having more bass and the 24 towards the leaner side. For the dielectric, to have a sound as fast as it can be, I use layers of braided natural fibers to enclose and assembles the conductors.

buy OCC single Crystal that's the best wire for audio and has been proven to be the best for over 40 years now.

I too went with self made cables. I used Belden cable and Switchcraft connectors. 

Townshend Fractal F1s are very good and worth an audition

@renatocomes 

There are some members you learn to ignore.