Re: the right scope
I, too, am in a scope quest right now. I can give you some general information regarding the scopes you are pursuing. I have no Weaver, Nikon or Burris experience, but I own a Clearidge XP 4.5-14X40, a Sightron Big Sky 3-9X42, and I have a hunting buddy with a Bushnell 4-16X40 4200. The Clearidge is a great scope; however, the XP was lacking in MOA so I had to put it on a .22LR (it is now a squirrel's worst nightmare). I believe the XP5 has improvement in this area and if it is at least as good as my XP both mechanically and optically, then I would suggest it as a good scope for your needs. The Sightron is an awesome scope, and the only thing keeping me from another one is reticle choice. I don't like much about the Bushnell. I know there are many that praise them, but I find the eye relief very critical, the FOV very small, and the color is not true. It is a great low light scope, though.
Good luck in your scope hunt.