Speaker Wire for Popular Budget System

Okay, I bought the hype regarding the widely viewed YouTube review which recently launched the Klipsch RP-600M into cult status. Actually did twice - First pair of these I picked up are in an asymmetric, long wall HT situation and I have no gripe at all about that setup. To be honest, I have few gripes about the second pair I acquired along with a NAD C316BEE V2 integrated much like in the YouTube video except that, in that configuration, the RP-600’s propensity to transform itself into a bright/forward ear-drill-on-steroids manifested itself early on and gratuitously so until I stumbled upon a combo room treatment/tweeter-damping-with-felt/ high placement with significant upward rake that has this system sounding 85% of the way I’d hoped it would initially. My question is, what speaker cables would you suggest for this “budget audiophilliac” system to tame that last 15% of forwardness in a manner befitting of Internet-reviewer-enthusiasm heaped of late upon this humble rig?

As always, thanks in advance!
Try some Kimber 4pr or 8pr cables, kinda affordable.
go to RadioShack and buy their 12 gauge Speaker Cable. Comes on a roll of 25ft or 50ft. I have put this in a number of friends systems that don’t want to spend a lot of money.
The RadioShack speaker cable got some very positive reviews a few years ago. I even use this cable in my second system for my surround speakers, using Kimber 4pr for my front speakers, B&W 801’s.
 I also use a $10K speaker cable on my main system.

…”What is your source?”…

Streaming Tidal from my iPhone to an Apple Airport Express which is now connected via Ethernet cable to an eero mesh network (was previously all WiFi using the Express with an old Apple Extreme router in the previous sound system).  This never was overly bright before but the mesh WiFi setup is a new addition.  I have a Node 2i in the main house system I should probably incorporate into this second system just for comparison.
I’m interpreting this canopy as something that could be affixed to the underside of the storage loft as a faux ceiling of sorts above the speakers??
Yes, that's what I mean. It would be easier than building something and it would provide acoustic damping.