I'd like to see the PC 945 line brought back - but it'd be great if they were compatible with 1911 mags - after all they are .45 single stack guns.
Would also like to see a PC line of 1911s that are aren't loaded with unnecessary features (i.e. forward cocking serrations, slide cuts). I'm fine with front strap checkering or magwells though - or other useful features like the ejection port cut and trigger guard undercut that Colt does. I don't mind the external extractor, but basically I'd like to see something like the S&W equivalent of a Dan Wesson Valor or Colt Gold Cup. Having the Pro Series full size guns in .45ACP would be a start.