Advice on speaker cables.

Try https://audiosensibility.com/. I have good experience with this cables. My system Monitor Audio PL300, Cary Audio SA200.2 ES power amp, Parasound JC2 BP preamp, Parasound JC3+ phono stage, Technics SL1210G turntable, and Marantz SA10 S1 SACD player. All cables are purchased from Audiosensibility and they perform amazingly well against Clarus aqua speaker cables, and  Wireworld silver eclipse cables. The beaty of dealing with Stephen is that you can try his cables and to return them if you are not happy.

I don't see anyone mentioning KnuKoncepts Krux cable here.  I tried some a long while back before you coud get it already terminated.  I thought it was decent for the price, but I don't have any high priced cables to compare it with.  It has the double helix contruction like the Kimber cable, but isn't quite as pretty.

Now I see you can get it terminated in a few different lengths.  I'm not affliated with them, don't know much about them, or what if any return policy they have.  I just bought some wire from them in the past and was satisfied with the process.

Thought I'd just suggest another option.

I have good quality Transparent speaker wires from my local seller of audio equipment that are 25 feet long (needed for my setup). They made them from scratch in their shop when I bought my amp and turntable from them, but available online for about the ame cost ($250+ for 25 foot pair).
https://www.transparentcable.com/products/hardwired-speaker-cable?variant=24880270180416

I then got far cheaper wires, after hearing about them online, through Amazon and they are almost as good (my wife cannot hear a difference and I am probably engaging in biased listening).
 

https://www.amazon.com/Micca-Copper-Speaker-Plated-Banana/dp/B078SBL7JM?pd_rd_w=957xD&content-id=amzn1.sym.6bb79025-718b-4ad1-b8ec-68027fb35564&pf_rd_p=6bb79025-718b-4ad1-b8ec-68027fb35564&pf_rd_r=7DSD2V95FC4SSD0WNFA7&pd_rd_wg=u12DD&pd_rd_r=6a9dccb0-bda1-4dcf-a376-f4680d93112f&pd_rd_i=B078SBL7JM&ref_=pd_bap_d_grid_rp_0_1_ec_i&th=1
 

Both are clearly better than my previous wires, but I have resisted going as far down this rabbit hole as one can (I would love to try out some Nordost Valhalla 2 wires - for free).

Tim

Based on my experience, I think the problem is with your amp and not with the speaker cables. Your amp is only 90 Watts and goes as low 4 Ohms. Such an amp requires more sensitive speakers than yours . This setup causes boomy bass and no speaker cable will ever fix this. 

This is a joke. As long as the OFC cable has the guage appropriate for the length of the run, NOTHING will sound better. You either believe in physics and the science of sound or you are willfully ignorant.