I've gone through a number of interconnects (and speaker-cables) over the decades, however started to look at inexpensive ones just to try, instead of chasing the elusive absolute-sound mega-buck cables ! I stumbled upon Audio Envy cables and have not looked back ! Captain at Audio Envy is easy to work with, will make up cables for you at your desired length and has a 30-day trial period ! So, buy em' and try em' is what I say ! If they don't work to your pleasure, return them ! His cables have low capacitance, and I use a 5-meter RCA pair from preamp to amps as well as 1 - 2 meter interconnects between sources and preamp. You'll notice the difference immediately. I also use his speaker-cables. They are a fraction of what I used to pay for higher-end cables...
Good luck in your cable-quest !