Personally, I prefer the 5 1/2" (or your 6") barrel to the 4 1/4" barrel in a 97. That short barrel doesn't leave a lot of light on either side of the .125" wide front sight. That's a personal preference, of course.
The .45 ACP shouldn't shoot well out of a revover, with that long jump to the forcing cone, but mine shoots very well indeed out of my convertible 97. The ACP cylinders also shoot very well out of all 3 of my Rugers. I can't tell you whether you want one, but I'm a big fan of all mine.