What cable companies make the best cables and sell them directly?

I went direct with Grover Huffman cables - Pharaoh speaker cables and ICs. Power cords next.  

If I had it to do over again, I’d buy used Acoustic Zen Silver Reference interconnects and Satori speaker cables (double barrel shotgun if you can bi-wire).  Buying good, used cables is one of the best bargains you can get in audio because you can sell them at little/no loss if they don’t work for you unless you happen to have a good dealer nearby.  If you can beat the AZ cables, buy them.  

I was lucky enough to try 100+ different cables. Nothing get close to High Fidelity cables. The price bites, but these are the best of the best of the best. Rick is the owner. You can deal directly.

If grade his tonearm Helix Ultimate Reference as 10, the next in line would be Graham IC-70 with score 5 and next Hovland Music Groove 2 with score 4.

I got his power cables and RCA interconnects that are awesome addition to my line up too. Didn't have room behind my rack and money to try speaker cables.

i love my CARDAS CABLES. 

If you use the balanced XLR connections, you can use just well built standard Mogami or similar and not worry about it.  By design balanced XLR removes any noise or coloration within the interconnect.