KnuConcepts appears to have some good stuff at fair prices..to whoever called them crap or junk, what makes you say that?
Like someone else said use a good quality, but reasonably priced product and you will be good to go.
I promise you that you arent going to be able to hear/tell a difference between Knu's decent RCA's and Stingers decent RCA's...or Monster's decent, or Tsunami...etc. Get something with a little bit of shielding, healthy RCA connectors and call it a day.
FWIW I use the Stinger"S Bullet RCA's..not because I think they are the best but because I get a good discount on them...better than I would do buying Knu's stuff. If I could get Knu for less I would use them...you get what I'm saying.
Keep it decent but don't think that you have to have THE BEST $100 RCA cable...keep it decent and call it a day.
People that spends $100's on a single RCA just don't have anything else in their system to do so they are going all out on the little details...or they have suckered themselves into believing it made a difference.
I had a system once with around $1500 in wiring....BTW I got most of it for free from Audio Quest as a dealer sponsorship..this was years ago.
I have a GOOD ear (at least I used to before I DJ'ed 3 times/week for over 5 years. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif ) and I don't really think I could have told a difference if someone switched it with decent middle of the road stuff...