Of the ones you mentioned:
Nikon Monarch UCC 1.5-4.5x20 -- I'd pass on this one. Too small of an objective lens for light gathering in dawn/dusk shooting situations.
Nikon Monarch 2.5-10x42 -- Should be a good scope but if you're planning on the BDC reticle, you really need to find one and let her look through it first. I just bought a 8X32X50 Nikon with their BDC reticle and the stadia lines are huge. May not be a problem on deer sized game but I bought mine for precision shooting on one of my varmint rifles and the size of the stadia lines will keep me from buying another one.
Leupold VX-I 2-7x33 -- Hard to go wrong with a Leupold and this one may be your best choice.
Bushnell Elite 3200 1.5-4.5x32 -- Don't have personal experience with the 3200 series but I have a 4200. Beautiful scope. Bright, clear, precise. Should be a good choice.
For rings, my favorite rings are the Burris Signature Zee rings. Swiveling polymer insert that relieves stress on your scope. Very solid mount.