Seeking informed recommendations for power cables and interconnects

The best advice you’ll get is to try some different cables, either through The Cable Co. or a dealer who has access without an agenda (I know, I can hear the snickers but there are some good dealers out there).
What works for one person in one system isn’t necessarily something you can readily extrapolate and apply to yours- you really have to hear these things in situ.
There are some known ’house sounds’ to different brands, some favorites in terms of synergy with certain speaker/amp combos, etc. but the only way to get to the bottom of it is for you to make informed decisions in your system using your ears.
I have a range of cables, from high end stuff that i use in my main system to a combo of DIY and modest, beer budget stuff in my vintage system.
You’ll get a lot of positive feedback from users who have gone through the process and reached a conclusion based on their systems and sonic preferences. Getting a dozen or more brand/model suggestions without listening wouldn’t be helpful in my estimation. And, cable changes, while they make a difference, aren’t a substitute for a good set up, placement in the room, etc. Do you own a copy of Jim Smith’s book?- that is probably worth getting if you don’t own it.
Have you tried running your amp direct into the wall rather than through the Furman?
PS: there’s a whole school of DIY cable that has gotten traction in the more mainstream audiophile community in the last couple years. That may also be worth exploring. Harder to try before you buy, but some of it isn’t terribly expensive.

Out of curiosity, I ran a search here on the ’Gon for Vandersteen, Rogue and cable and many of the hits returned AQ cables as recommended by Richard Vandersteen.
There is something to be said for ’same brand’ full ’loom’-in that the character and overall sound becomes cumulative. (Why this should be with power cable vs speaker and interconnect is an interesting intellectual question I can’t answer). That said, The Cable Co. also has a division called "Used Cable"-- I don’t know if and how the cable loan program works with the Used Cable business, but it could give you the opportunity for home trial and mark down buying used cables. -
The first time I fooled around with cable changes I had a pile of different speaker wires loaned to me by my then dealer in the late ’80s and spent the weekend listening to them. I can’t remember what I concluded or whether my choice had any relation to price, but I felt pretty confident about my conclusions at the time.
I’ve been running essentially the same brand since 2006 in my main system with one upgrade at the earliest link in the chain that I could substitute- from phono stage to line stage. The manufacturer has a generous trade in allowance for upgrading so all that worked in my favor. Haven’t really thought about those cables much since the one upgrade 5 years ago.
When I did my vintage system more recently, i wasn’t interested in kilo dollar cable, so sought out DIY and well constructed modest cable--having owned most of the equipment in that system since the early ’70s, I remember how little attention we paid to wire in those days- zip cord for speaker cable and lord knows what for interconnect and power cords (probably stock). That system sounds wonderful and cable cost was truly minimal. (All the gear had been fully restored)
Good luck, this should be a fun process, not one that makes you crazy,
bill hart