Hi.
After corresponding with John Siau (brilliant head engineer of Benchmark Media and the designer of the best amp in the world) as well as a friend who's a physics professor that enjoys rehabbing vintage amps and receivers, the magic cable myth for me is dead. The biggest things to look for are the best construction, shielding and lowest impedance you can afford. None of this requires a ton of money to achieve.
While Pangea does make some rather needlessly expensive power cords, their least expensive cables are ridiculously good. And, if you want to roll your own, Madisound sells Supra plugs and LoRad cable. Yeah, a bit more than the Pangea entry stuff, but it's designed using science. Also, Supra makes some fantastic speaker cable that's worth every cent of the $3.80/ft (or so) that Madisound charges.
I just rebuilt my audio system and spent the dough on Pangea's power cables because they can be ordered as short as 0.6m. The shorter the cable the less EMI you are radiating into the room and that's a big thing in keeping your system noise-free.
For the speakers, I used Supra PLY3.4 Speaker Wire and rhodium spade connectors. I got a great deal on HDMI cables from Accessories4Less and ordered custom XLR cables from Blue Jeans for the connections to my power amp and subs.
I whole-heartedly concur that wasting money on magic cables is buying into a load of marketing hype that has no basis in fact or science.
The clowns at other sites and publications that push this BS about magic cables really need to get a reality check... or a severe ass beating... or both. It's even more idiotic than holding onto vinyl as a delivery system for music. Which is made even more imbecilic when you consider that almost nothing is recorded analog anymore. The stupidity of a good slice of the audiophile community is amazing.
Cheers,
jeff