My 686+ seven shot 5" Pro came with an interchangeable Patridge front site. I installed a fiber optic site to replace it. Here is what my experience has been and although this scenario is different from yours, it may help you determine if you want to go forward with your change. For shooting paper, I found the Patridge to be more accurate. For quickly acquiring the target, the red fiber optic site is better. I also have a red ramp site on a 4" Model 27 and I personally like it a lot too. When I compared the two guns before I changed the 686 to the fiber optic site, I really didn't see much difference in the two, maybe the 686+ was a little more accurate but sometimes it just seemed to vary day to day. I think the bottom line is that it is just a matter of personal preference so do whatever you think will make you most happy. Since you indicated that yours is a pinned site, it will be more expensive that the site I switched out which was interchangeable.

Regards, Jim