Speaker cables with good timbre

i would buy and make your own the GR research cable kits superior performance yet low cost ( a pair of 4’ are i believe less than $100! )
they will surpass most all others 

sure am glad in the automotive, M/C  world there is no such as the $18K AQ cables!  guys do not buy and shops do not sell things that are BS and do not work! 
noone will buy / sell a tune that does not actually increase engine power! performance but i see audiophiles will get very weird insisting something works when it does not ! they would be good cult members!  and it is legal to sell BS cables yet a bitcoin scam gets you locked up ! 
the proverbial license to print $ ! 
https://gr-research.com/product/diy-audiophile-speaker-cable-kit/

+1 on the Acoustic Zen Hologram, these deliver what you are looking for. 

Grover Huffman Pharoah speaker cables are superb and check well all the boxes u specified....

I highly recommend Belden 5T00UP 10AWG speaker cable. Transparent, nice details in high and low notes. I diy it with Nakamichi banana plugs. BJC uses them too but you save about 50% with diy. Just a quick comparison on the critical parameters here with another DIY cable mentioned above:

- CHeLA OCC, 11 AWG, capacitance (230 pF/?), DCR (0.00135 ohm/ft). $43/ft.

- Belden 5T00UP BC, 10 AWG, capacitance (26 pF/ft), DCR (0.00103 ohm/ft), $1.89/ft, twisted geometry.

Although CHeLA uses OCC, its capacitance is much higher (despite the unit length) compared to Belden. Note again, high capacitance in speaker cables can negatively affect audio quality by attenuating high-frequency signals and resulting in a loos of treble details and clarity.  Both have reasonably low DCR (note that you want to stay under 0.01 ohms for speaker cable resistance in general). Part of the high unit cost stems from three factors: (1) copper material purity (OCC: ≥99.99% vs. BC: 99.9%); (2) OCC’s larger, more linear crystals; and (3) CHeLA being shielded, whereas the Belden 5T00UP is unshielded. Whether the significant price difference for copper purity, longer copper crystals, and shielding (which is unnecessary for speaker cables) is worth it is ultimately up to you.