Nikon Force Xr EER handgun scopes are New - so new that if you didnt go to "Shot Show" you proabably have not seen one. Im not sure if they are even available yet call SWFA to find out.
So far my favorite handgun scope is an Aimpoint. I use a 9000L with two 30mm rings on a TC Encore pistol and like that scope a lot. I could sure see trying one of the Nikon 2.5-8 BDC reticle scopes but I will say that the 3-12 x32Burris Balistic Plex that I had was quie useless over about 6x because eye relief changed drastically and holding the scope where it would focus would have had it in my face constantly therefore I am a bit shy of thinking I can get too much power out of one. You might search some of Ernie Bishops threads on handgun scopes he shoots some ultra long range with some altered rifle scopes with good success.