I just hope you won't get bored with a rifle that shoots inexpensive ammo with little noise, no recoil, and good accuracy.
So many Internet Nimrods require blast and kick to get the full experience.
The leading good quality sporting rifle here is the CZ 452 or 455 American.
Of course you can spend as much as you care to on a serious target .22 but the CZ will take you a long way.
Check in with my friends at Rimfire Sports, with special attention to the CMP Sporter stuff.