The mc cable would be excellent from the breaker to the wall outlets at your system, and maybe better than Romex due to the shielding.
I have never used the Black Mamba PC but I do have a pair of 2M Oyaide Tunami v2 cords (10awg+) here for my mono amps. Changed my set-up and no longer need 2M cords so am using much shorter Furutech FP Alpha cords (11awg) with Oyaide P079/C079 connectors. They both sound good. The Oyaide cords are stiff.
BTW, is your avatar a Belgian Malinois? My wife and I have enjoyed having 6 different husky’s here over the years but it is about time for another dog and we have been interested in a Malinois. The stubbornness, energy, and intelligent alertness seem to be shared traits but the Malinois is probably a bit more protective.