I'm wondering what the beny's are to changing out your rear sight. I own a M&P 45 with the white dot Novak rear. Is the bed(area between your alignment dots) wider/deeper? does this allow one to see more of his/her target to either side of the front post? The Novak rear is very streamline (no snags) IMO, so I can't see a reason to change there. Unless you wanted to go with NS all around. Why does one change out the rear sight?