Is the Shunyata Delta NR a significant upgrade from stock Macintosh?

[Mouse]

Is the Shunyata Delta NR a significant upgrade from stock Macintosh?
I head a demo of Frey 2 Nordost proving that their power cord is superior to the OEM cables. Shunyata's involvement in this forum, and they're dedication to customer education and their youtube scientific youtube videos, and somewhat realistic prices compared to Nordost and some other guys has me leaning in their direction.

The alpha pics just look like an anaconda ready to swallow all my electronics. While it's pretty to see an enormous cable when it's all on display, I don't think that's what I want to try to stuff behind my Salamander cabinet in my home theater. I don't know that several alphas will even fit.

So will I hear an audible difference using delta NR?
One thing I am concerned with Shunyata's brand is their lack of silver plated cables. I haven't heard Shunyata so I don't know if I'll care, but I tend to like the sound of silver plated Nordost speaker cables.

At this point I have a lot of low end AudioQuest cables: Rocket 88 bulk wire local dealer-made cables, makenzie XLRs, cinnamon HDMI, and stock power cords. I don't feel like my cables are really hurting my system, but I don't think they're helping. The biggest hole in my system is my lack of awesome subs, and better surround speakers, but I think the cables will need to be upgraded too.