I casually shoot ara and nrl 22. The rifles that do the best/most popular are the cz 452, 455 and 457, tikka t1x, and bergara b14r and bmr in that order. I have two 457 left hand varmints. one is in the factory wood stock and the other is in a grey birch stock, jarg trigger and has an l3i barrel. I dont have any complaints with the cz's. CZ' dual extractor and controlled round feeding bolt makes it the most reliable 22 bolt action. Swapping barrels and or calibers on the cz's is a big selling point. If someone made a 21 sharp barrel for the 457 i would like to tinker with that.
I had a t1x for a short amount of time. My major complaints with the t1x is some misfeeding issues, the mag isnt as good a cz's. Pro's for the t1x is they can use alot of the t3x stocks so you have alot of aftermarket options. The t1x is accurate and probably has a slightly better trigger out of the box. Just like the t3x's tikka using an obscene amount of thread locker on their barrels. Good luck getting it off. Also there is a lack of after market barrel options for the t1x. If tikka put 10 percent more effort into the t1x it would be the top rifle.
My loaner rifle is a savage mk II FSVR. It is a cheap , reliable rifle and is more accurate than it has business being. I put it in a boyds stock and bedded the action because the factory plastic stock has way to much drop.
If you want the most accuracy out of a .22 messing around with different brands of ammo, nicer trigger and a better barrel in that order.