Which inexpensive speaker cables...

I'm waiting on a demo set of Graham Slee Spatia cables.  I just demo'd their CuSat50 interconnects and loved them, so I ordered a pair.  Depending on the length you need, they might come in right around $200-$230 shipped direct from England.  You can also sign up for their US loaner program and try them out for the cost of shipping (from Kentucky, where the loaners are).  

https://www.hifisystemcomponents.com/interconnects-cables/spatia-speaker-cable.html

Keep in mind that the British Pound price shown on the website includes 20% VAT, which will be deducted from the price for US purchases.  

I'm also about to demo Blue Jeans Cable Ten White, which a lot of people rave about as best bang for the buck.  These will definitely come in at less than $200 for a set.  You can buy (and return) Blue Jeans cables through Amazon (but the company is based outside of Philadelphia): https://www.amazon.com/Blue-Jeans-Cable-Speaker-Terminations/dp/B097S6Q182?th=1  

Another cable that I've heard great things about is the Duelund DCA12GA unterminated.  It costs about $33.75 per meter.  You could then buy some inexpensive spade lugs to add.  You can find Duelund here:  https://partsconnexion.com/cart.php

Belden 9497 is well received and can be purchased for about $4 per foot or in ready made pairs.

I make my own out of Cat 5 or Cat 6 from eBay, cut any connectors off, twist different colors, add WBT type connectors from Parts Express or Amazon

Add a few feet to allow extra length needed when you twist them.

Pay attention to the details: I go for pure copper, foil wrapped, 4 shielded twisted pairs, prefer stranded to solid core, 

8 x 24awg = 15 awg

If you can find it, 8 x 22 awg = 13 awg. (smaller awg # is larger)

multiple strand calculator

DNM no question

https://www.dnm.co.uk/cables.html

https://www.dnm.co.uk/acatalog/Ready-to-use-DNM-Cables.html

I can't remember the model number but I had good results in an HT setup using lower end bulk Audioquest cables. I terminated them with some decent quality spades/bananas from Parts Express.