Get a Flattop convertible.
That pretty well sums it up. I had a blue Flattop 44 Special and found a Stainless one. My 45 Colts are full size Vaquero and full size blackhawks. Problem is if you get stainless it's all steel and slightly heavier. If you get a blue one with an alloy grip frame it's slightly less weight. Enough to make any difference? That's up to you. The Convertible is a fun idea for sure.