I just changed out my Red Dot sight from a C-More with 12 MOA dot to a Bushnell Fast Fire II with 3 MOA. I installed it on an EGW mount for the S&W revolvers.
I like the fit and the weight of the new sight. Three MOA sounds small but I can find it fast enough right now. More experimentation will be needed before I use it in a match.
The dot has a number of level for intensity so I'm sure I'll be able to find the right one.