My first favorite handgun was a Colt SAA but my was .38-40, not .45 colt. The only negative for me was I'm a handloader and tinkerer, I like to shoot lots of different loads, try this and that, and for that, adjustable sights are far superior because bullets of different shape and different weight, never mind changes in velocity, shoot to different points of aim. Also, at least on my Colt, the top of the front sight was rounded rather than squared off making repeatable holds a bit more difficult. The FA 97 is available with fixed or adjustable sights. For me, adjustable sights win hands down every time. It's a very strong gun and among the finest crafted handguns available. No "lose" with a FA.
However ...
My first choice in a lighter duty SA .45 would be a Ruger flattop stainless, a Lipsey's distributor exclusive.
Tom
