I've had a few .22s and the Mark II is a phenomenal value - no doubt about it. As with all of these posts you'll no doubt be advised that you "might as well buy a CZ or Anschutz." I think it really depends on what your endgame is; the Mark II is just accurate enough to leave you wanting that 1/2" challenge and in my opinion those who have completed it must have purchased exceptional rifles. My Mark II is a sub 1" rifle with just about any ammo and I've shot down to 0.3XX" with match ammo but have never been able to put 5 groups together. If you're looking for a fun, accurate rifle in the $200-$300 range, I don't think there is really any other option.
I also really like the Norinco but be prepared to do some work at home to get it shooting (entirely manageable stuff). I haven't looked recently but last I checked, people were still selling them for more than they're worth (IMO). Be advised that these exploded in popularity at $199.99 from Canada Ammo and many people bought them in multiples and are now looking to flip them. It's a separate issue and it is what it is - just FYI.