Speaker Cables For $300

Another vote for Satori. Also, another choice you may be able to find an original Audience AU24 used. 

May I suggest you check out Pinetree Audio  I bought a pair of their 8 foot speaker wires and I'm very impressed with the performance and there look! You will be pleasantly surprised by the price and they are made in the US 

Ultra Low Resistance Design 

12AWG Oxygen Free Copper Wire

Nakamichi Banana Connectors

TechFlex Military Spec Nylon Sheathing

Heavy Duty Y-Boots on both ends

Satori. Over your budget a hair, but if you are patient, you can get close. 

You ask a great question.

My experience has been that great-sounding speaker cables can be found at every price point: low $, medium $, high $ and truly insane $. 

As a testimonial - My ARC Ref 6SE preamp now has 200+ hours on it, and as it has been braking-in, my low$ speaker cables have revealed everything nuance of the process... changes in tone, changes in staging, changes in attack, and the list goes-on.  

Last night I was listening to one of my reference LPs (Imaginary Roads, William Ackerman WH-1078), this LP had a beauty and clarity that, in 20+ years of playing, had I had never experienced. It was a 'goose-bump' moment.

I am using AntiCables Level 3.1 (biwired).  They reveal every change that I make upstream, and I do not hesitate to recommend them (even for systems costing tens-of-thousands of $).

An 8 ft. pair retails for $310.  Anticables.com...  I am a customer and have no business affiliation.

+1 @inagroove My experience has been that great-sounding speaker cables can be found at every price point:

I can contribute the low-cost cables I have been using, including:

1. Micca 14 AWG: Introduced by Steve Huff, this cable is a bit rolled off in the treble but renders a transparent and sweet sound.
2. Belden 5T00UP 10 AWG: This cable even outperforms the Micca 14 in low-end extension. It is used by Blue Jeans Cable.

The RCL measurements are critical (in this order) for both speaker and interconnect cables. Alpha Audio has conducted extensive measurements and listening tests for 32 cables, most of them in the medium to high price range. See the link below if interested.  I can tell you that the resistance and capacitance of the Belden 5T00UP outperform most of the cables they tested. If you DIY it with good banana plugs, you end up with about $50 for a pair of 8 ft Belden speaker cables, compared to $100 per pair sold by Blue Jeans Cable. Highly recommended.

https://www.alpha-audio.net/review/megatest-speaker-cables-32-cables-listened-to-and-measured/