That's one fine rifle! As far as scopes go, $400-600 3-9x scopes for are a little out of my area of expertise. Generally speaking for a rimfire you're going to either want the objective to be factory set at to be parallax free at 50 yards; or use a scope with an adjustable objective - something rare in a 3-9. Two possibilities (I'm sure someone will come up with more). For hunting/plinking you could pick up a Leupold VX-II 3-9x33 EFR rimfire scope for $370, or pick up a Leupold 3-9x40 VX-II centerfire scope for $300 and sent it in to Leupold to have the parallax reset (~$75-100) to 50yds. I have no doubt that one of the gurus will come up with other options.
I looked it up and just as I thought it has 11mm mounting grooves in the receiver. That doesn't leave you a lot of choices for rings and a lot will depend on what scope you end up with. I know Leupold does make some 1" 11mm rings in various heights.