I think the shotgun is a ridiculous piece, as there are better options. I dont feel the coach gun is a viable concept anymore. That being said, the rails DO offer increased capabilities, and I dont see that as a bad thing at all.
As for the Smith, I think the Aimpoint is too large for the package. Subsitute the Comp for a Docter or Trijicon RMR type optic, like on the Stoeger, and I think its a hell of a gun for HD type use.
What, exactly, are the downsides to these ideas? They make the gun work better....
Nostalgia is a wonderful thing. Sacrificing ability for aesthetics is, at best, foolhardy.
Words from a guy who totes a 1911 for duty use.