I'm headed down this path as well (see my other thread) after switching over from .44 mag.
I did this because a buddy of mine got me hooked on 45 colt!
So now I'm interested in .45 Colt and .454
I had finally moved my few remaining .44s, which consisted of a S&W 629 performance 7 inch, Ruger SBH Hunter 7 inch, and stainless Rossi 92 16 inch.
The first gun I'm looking to replace with these newly acquired funds is the Rossi 92. (I'm torn between the .454 and .45 Colt versions.
Prior to owning the .44, I had the .357 mag. version of the Rossi 92. It wouldn't feed .38 spl. in ANY flavor.
The .44 mag version was very picky about the bullet shape.
I've read several articles about the Rossi 92 chambered in .454, this being one of the more comprehensive reads:
http://www.realguns.com/articles/588.htm
I also liked this article as well:
http://www.thetruthaboutguns.com/2013/08/chris-dumm/gun-review-rossi-model-92-lever-action-45-colt/
I still haven't decided either.
I do know either way I go, it will be a 16 inch stainless.