Damn. Hope you're well now!
There is no reason you need to stick with the same cable throughout. Some people use the same brand for all their cabling, some mix and match.. I've heard of people that like the house sound of a cable company so much they do all their cables through that company, while I've heard of others that mix and match to achieve a desired sound goal.
It just depends on what it all sounds like to you and what you like.
I'd offer that you should try various power cords on different components using as much reason as possible. Obviously, if you've a power center, you should have a large gauge cord going into it, so as to not limit current (10 would be best, especially if amps plug into it) Power cords to amps tend to sound better if they're larger gauge (12-10 is ideal, 14 is ok on lower power amps). Digital components can often benefit from shielded cords that have the shield grounded. Of course there's disagreement in whether the cord shield should be grounded at the component or wall.. Consensus? Ha!
But really, if you like it and it sounds good to you, that's the most important test.
