Depends on what you do with your SIG. Many competitive shooters, me including, find a single bright dot in the front easier to focus on and quicker on target. This is what makes handgun shooting fun and distinctive from long guns. So I didn't really want a full f/o set.
Plain black rear might be ideal, but the night dots are small and not much of a distraction. I left them alone. This SIG I shoot for sports. The pics suck as always but give an idea. I hope this helps.