I'm a latecomer to AFV's so it'll take a little time before I've read everything that's good a hundred times over yet. You're obviously certain about the Panthers and should know better than me. I was sure too, but nowhere near as confident.
I've got say forty really good books on aircraft and two on vehicles, plus whatever I can remember from docos. Luckily one of my books has a lot of German diary entries and whatnot, but it is super detailed for one period and then very general for another (meaning you have to use it with detective work and I haven't honestly done all the ground work).

I hereby defer to Erich's more comprehensive knowledge