Recommendation for an audiophile speaker cord that is not "bright"?

Seriously? (Eye roll) send me your cables and $1000 and ill soak them in my patented anti-bright cable conditioner for one full cycle of the moon and send them back...

Analysis plus crystal ovals might work well for you.  I liked them so much in my somewhat bright/forward system that I ended up purchasing a full loom of their interconnects as well.

they are fairly reasonable price-wise when purchased new, but you can find really good deals in the used market.

https://www.lowesforpros.com/pd/250-ft-14-2-Standard-Speaker-Wire-By-the-Roll/3137563

I have what used to referred to as some of Wilson's least forgiving speakers (W/P 5.1).  I splurged when I found a deal on some used MIT Matrix HD 60 bi-wire cables (for around $1500 IIRC). And they are a match made in heaven with the Wilsons. Some folks object to the retail MIT pricing, but they really are like a component upgrade that makes everything come together beautifully. Wilson and Magico used to use MIT (may still) in  their audio show demos. 

Morrow Cable, not bright but very accurate and not very pricey. They are made of woven Litz wire OFC copper. The improvement I heard over silver plated OFC copper was like night and day! They run 50% off specials for Agon members and trade ins. You may be able to talk Scott into extending that to you. They will make and burn in your cables in about two-four weeks. Nothing is stocked, everything is custom terminated to your specs from a wide variety of termination selections.


https://www.morrowaudio.com/