Speaker Cables : Moderate priced

@mitch2 +1

that's a wise and solid advice. $1500 can be invested in a better source, preamp, etc. a much better ROI than the speaker cable upgrade 

Canare 4s11 is a good cable. Its fault is in omission. It’s not as extended and doesn’t have the separation and clarity of the AU24SX but it sounds decent.
I think Dueland might be a better choice.
https://partsconnexion.com/products/dual-dca12ga-2x12-awg-tin-plated-stranded-copper-oiled-cotton-speaker-interconnect-cable-black

Moving up the DIY chain would be the Neotech NES-3002 but it’s a pain to terminate ( need to be patient). Scroll to the bottom of the page. 
https://www.vhaudio.com/wire.html

Keep both left and right channels runs length identical

Mogami is the cable you use when you either sold your good cables and have the mogami as a backup to hold you over, or are listening to the system that’s on the level of mogami…low-fi or lower tier mid-fi. It has no place in a good system as it will limit its potential. 
I personally prefer Canare 4s11 speaker cables and Blue Jeans interconnects to any Mogami including Studio Gold. They sound fuller and more natural to me.