I admit, I skipped to the end so I could post this link.
I for one do not buy into the snake oil. I'm not going to drink the Kool-Aid, as it were. My humble opinion of course. I did go for Audioquest cable, but at the entry point level more or less. I do recall when I first did this, replacing the el cheap-o speaker wire with Audioquest Type 4, I could not hear a difference. {my wallet had more of a hollow ring to it though} Same with interconnects. Standard Big Box store RCA or Audioquest, I hear no improvement. Will multi thousand dollar testing equipment detect a difference? Most likely. But human ears? Nope! I bought them because they may be physically stronger and last longer.....and most importantly, they look nice.
During my speaker audition using the SA30 integrated, they first had William Tell Silver's hooked up. As I wanted something closer to what I use he swapped them down to something in the Rocket level. No, sorry. I heard no change.
When I picked up my new speakers yesterday I was offered to upgrade my wires from the Type 4 to "at least the Type 9" I politely declined.
Just my two cents worth. But don't take my word for it. Google is your friend.