That's a well done review
I have a 452 that shoots well, though I was considering something with a heavy barrel. I was considering the Savage Mk-IIBTVLSS, which seem to be decent (and available left handed), but I'm not sure if it'd be any better than the CZ. The Ruger is interesting, with an ergonomic advantage for basically the same price (righty only - boo).
Then I wonder if I should not just go for a 64MPR when I can save up for it.
The other question I have about the Ruger is that 3MOA rail and what that means with your average rimfire scope. What are the min distances that you are likely to be able to zero for without running out of adjustment?
No doubt someone will someday make a flat rail for it.