Make your own, make your own.
I would go SUPERcheap - the cheapest you can possibly buy. A few bucks. Then try more expensive cables, and see if they make a difference. You may find that cabling is the least cost-effective way to improve your system,
For line level interconnect, I use pro microphone cable, Canare StarQuad L-4E6S with ETI connectors. Mogami W2534 and ETI connectors is a good alternative. For speakers, I use Goertz. About $200 all in for two interconnects and two speaker cables.
Just one caution - if you are soldering teflon jacketed wire, be very careful to exhaust the fumes. Mogami is probably a better choice for that reason, but I have a soldering station with a fume hood, so I can get away with it.
Works for me, and my system is far from cheap. I would rather spend money elsewhere.