I have a pair of Chapman T-7's, mine are completely original from 1995 and have the German LPG Titanium dome tweeters which do run a little hot on Solid State, but sing on tubes.
I used to run Tara Labs RSC Master Gen 2 cables that I thought sounded great. Then on a lark I built a pair of DIY clones of the GR Research cables, which are in turn a clone of the Kimber 12tc ? (I think). You can get the raw cable easily on Aliexpress for pretty cheap. I think all in I spent less than a $100 on materials for a 3 meter pair with CMC copper spades.
I never advocate chinese knock-offs or clones. But like I said, this was just an experiment for my own benefit. However, I have been really pleased with the cables. The difference was subtle over the Tara Labs and they seemed to incrementally tame the sizzle of the metal domes just a hair more.
BTW, I love, love, love the Chapmans and don't think I'll ever part with them.