I've bought most of the revolvers I thought I really needed, there's a couple more yet to snag and I absolutely love 'em and enjoy shooting them (a lot!) but I wouldn't call any of them a "dream revolver."
I have never seen a Korth in the flesh. I really, really want to see one, handle it, get a feel for it's build quality and if I believe what I've read, that could possibly be a dream revolver. I suspect (and do NOT fear!) that if/when that happens, I will make a Korth a reality, some how, at some point.
But I'll go a different route here for the end of my answer:
My DREAM REVOLVER is to conjure up something that does not currently exist. As such, my dream revolver would be that Chiappa goes belly up and in a last-ditch effort to bleed dry the turnip or pay off some bills, they sell the licensing and design of the Rhino, preferably to Smith & Wesson or Ruger, who uses their manufacturing, design and execution abilities to market the bottom-shooting cylinder revolver that actually has some manner of build quality, backed by a decent manufacturer.
The revolver can look like, well, anything. I mean to say, if it ends up being as corn-filled poop ugly as it is right now, I'm fine with that. But it simply must have a better, smoother double action trigger with more mechanical advantage and it's got to be built with some genuine quality and workmanship.