Best "Giant Killer" Value Cables For...

I have had Gregg Straleys' Reality Cables in my system for years, both the interconnects and speaker cables. These cables are so refined and realistic that the notion of getting another brand of cable does not even enter my mind.

Check out Increcable Diamond list $180 meter. Great cable

I also agree ,that the Analysis Plus Oval 9 is an exceptional loudspeaker cable ,and the Solo a Crystal Copper interconnect is a steal at it's price
If you need more air and sparkle on top the more expensive Silver over Copper In- Connect is the way to go ,if you want a bit more focus on a meatier midrange stick with the Solo Crystal . I Strongly advise
Keeping with same brand Oval as a cable system ,interconnects,
And Loudspeaker cables to get the most out of your system impedance
Inductance matching is very important, and 300 hour breakin may seem extreme ,but true it sounds much better after 150 hours,but at over 300 hours even better low level detail and focus. I would recommend the
Purist audio breakin cd , or the Isotek cd is very good and track 3 is a full system tuneup 5 minute set of sonic sweep signals done daily or weekly you can hear the difference ,in a sence demagnetizes the whole electronic system.

I'm not sure how they do with Class D, but in my system Level 2 Performance Series Bi-Wire Anti-Cables performed equally* to Audioquest Sky. $2,500 a meter or $46 a meter? You choose.

*Caveat: the Anti-Cables need to be reenergized for 30-45 minutes after any week long vacation. The Sky doesn't.

This is somewhat of a "late entry". Almost didn't bother. WHY??? Because you can talk to 50 different people and get 50 different opinions, the majority of which may not even be relevant.

I did notice (above), two or three entries pertaining to REALITY CABLES.
I have known Greg Straley for a number of years now, since he started his boutique cable business. At that time, he was either President or Vice President of the "CHICAGO AUDIO ENGINEERING SOCIETY".
Resultantly, he had an entire panel of "extreme" audio enthusiasts and engineers at his disposal, that provided significant assistance in his product R and D. 
The first time he got me to try them I thought, "are you kidding". These things look like red rattlesnakes, which I have fondly called them ever since.
At that time, he left a set of IC's and speaker cables with me to evaluate for many months. During that period, I went through a number of pieces of tech Including PRIMA LUNA, and AYON. Also, MUSICAL FIDELITY, plus a couple of other custom pieces. At that point in time I had already accumulated about 30 different brands of cables, including ANTICABLES, MORROW, and HARMONIC TECHNOLOGY, to name a few.
So, what's my point here; - - - With all of my component swapping during that period, I have to state that in every case, and components combinations I put together, it was always the  REALITY CABLES that shone the most brightly in the audio reproduction path.
To this day, and many pieces of tech later, I am still an avid fan of REALITY CABLES. GRES STRALEY has made several upgrades to his designs since the time I bought mine. One of these days I intend to try his latest offerings, though truthfully I don't know how they could be improved significantly over my old and current ones. 
Well, perhaps making them more flexible, but that just doesn't fit the design equation unfortunately.