I have one of the older Nikon Monarch UCC 16.5x 44mm scopes (5.5-16.5 I think it is). Beautiful clear scope, probably the best of any I have including Leupold. But... the cross-hairs (duplex) are a bit thick for 300yd shots on small targets so I just moved this one over to my CZ 22 hornet. I'll be good out to 200 for sure with this gun now.
I just bought a Weaver V24 with Varmint reticle. 42mm, nice and clear, the reticle is definitely very fine(they call it "XDOT", like a combination of duplex and target dot), and the price couldn't be beat at just $315. But... this scope does seem much more parallax sensitive, which is a bit of a pain when ground-hog hunting. So look at Nikon, Leupold II or III, Sightron, Zeiss, or even Bushnell's 4200 series and I don't think you could go wrong.
Let us know what you end up with.