Need recommendations on speaker cables

Try The Cable Company and demo several cables against your current ones. I'd suggest starting with something that has a very different design to see if you can hear a significant difference. The shorter the length the less difference that is expected. I recently built some DIY Cat5 based cables, but if I were going to purchase cables I'd likely start with the Kimber Kable 8PR though I can't really provide a specific reason other than I like their design and think this should be a high value product.

I'm using MIT Mag3s biwire from a Mac402 to 803ds. Very nice sound and can be bought used for around $1k

buy used here on Agon, try em and swap if they do not suit you.

What is it the Audioquest do not do right for you?

I will repeat what has been asked? What sound are you aiming to get vs what the audioquests yield. A used cable dependig on age etc should run you about 50% of new thus research $2000 cables. My personal favorites for a more detailed type speaker, JM lab Electra 936s, are the all copper braid from Jena Labs. No I am not selling them so I don't know where that idea came from. The least expensive are great but I imagine they get better as you go up the line.