Cable recommendations for my new (preowned) system...

For interconnects, get a pair of Blue Jeans cables inexpensive interconnects.  They sound much better than the entry stuff from Kimber, Audioquest and all the others.  For speakers, go with the Canare 4S11 cables which Blue Jeans can make for you.  Very inexpensive and they will hit home runs with your equipment.  

Even if you don’t have a tight budget, Canare is a great place to start. They do take a crazy amount of time to burn in or open up so don’t judge them for awhile. If you want the next step up in my opinion look at WyWires Blue series or if you budget is more then look at their other series. I’d start with Canare first though.

Buy used. Definately check out 'Audio Envy'. 

https://www.vhaudio.com/products.html

I’m a DIY http://www.venhaus1.com/diymains.html. kind of guy and just can’t justify spending big bucks on cables. They also sell them assembled.  Great quality at a nice value.  Their connectors are nice quality but a bit pricey.   I have even found some nice quality all copper connects on ebay and amazon.  I prefer a warmer full sound so intend to go towards all copper with gold plating connectors.  Cheers!

I recently wrote this for another Audiogon member seeking a good but reasonably priced interconnect:
A little over eight years ago I came across a very positive review of Stager Silver cables in Audiocgon: https://forum.audiogon.com/discussions/stager-silver-solid-interconnects-2.html
Based on that and other reviews and user comments on the Silver Solids website, I decided to try a one meter pair, given that I could return it inside of 30 days for a full refund if I wasn't satisfied.Long story short: They're exceptional cables, among the finest available probably at any price. Now my entire system is uses Stagers, and some friends who share my love of music, live and well reproduced, also have them and are very happy with them. And they are not as expensive as you'd expect for this level of excellence. (I just checked and the prices are still the same as when I bought them in 2013.)