Warm, flexible, cheap-ish cables?

In addition to the suggestions provided here, I would consider making contact with the Cable Company for a free consultation, as well as their lending library if you have the time and want firsthand experiences with various cable looms.

Within my system, I prefer warm-ish sounding cables which originally lead me to Cardas. If wanting to purchase new interconnects and coax I’d take a look at their Iridium line - maybe Iridium RCAs and Parsec Coax. For speaker cables, either their Crosslink line for shorter runs or the 101 “no frills” speaker cable for long runs through Audio Advisor if wanting to stay under that $250 limit.

I personally think their Iridium line is the best value.

Nonetheless, lots of options to explore beyond Cardas!
 

Audience OHNO. Keep in mind speaker cables almost always cost more than the interconnects. Check https://partsconnexion.com/

@toro3 +1

Call The Cable Company.

Triode wire labs spirit.

I’d give a call to Ice Age Audio and Pine Tree Audio and see what they recommend for your needs.  Both have a reputation for giving helpful advice and are a big step up from the cheap stuff but still well within your budget, and I believe both offer a trial period so little risk.  Best of luck. 

https://iceageaudio.com/ice-age-audio-store

https://sites.google.com/view/pine-tree-audio/home

Definitely look at Cardas... through the Cable Company. They have new and used. The lower on price the warmer... they are assuming lower cost components will be used with lower levels of their products and therefore be cooler more analytical sounding. Which they tend to be.