I've not tried any of Doug's (Cat cables) cables so I can't say what they're like.
I do have a Bolder M-80 speaker cable. Which is supposed to sound like the M-80 IC as it's the same cable being used.
I've found the M-80 speaker cable to be exactly like everyone has said the speaker & IC cable sound.
I'm most pleased with my Bolder speaker cable as well as the various digital's I've had Wayne build me. Am planning on eventually re-wiring
my entire setup (that's a lot to replace...

) with Bolder products as I've found them to perform waaay above their price range. And the service has been excellent the whole time I've dealt with Wayne.
I doubt you'd be disappointed with the Bolder M-80 IC's...