I still think that the way the CQB Billboard is done on this prototype (18DAI's gun, in another photo he took) is far more attractive than what S&W decided to do on the four "production" Performance Center models. Sure, it involved additional machining cuts, but they made a great pistol look even better.
Alex, I get it: wanting a short production run Performance Center pistol is a worthy desire. But with prices what they are, and the fact these don't come up for sale very often, a more obtainable objective would be one of the 4563 guns, with internals enhancements by someone like BMCM here on the Forum. Even a bone-stock 4563 would likely provide you with a good-looking, well-made, and accurate pistol to own and enjoy shooting. Just a thought.