I casually shoot ara and nrl 22. The 22 rifles that do the best/most popular are the cz 452, 455 and 457, tikka t1x, bergara b14r and bergara 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 were some misfeeding issues, the mag isnt as good as 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 uses 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 but manufacturers are starting to offer more options. If tikka put 10 percent more effort into the t1x it would be the top rifle. Ultimately i sold the t1x because buying a bunch of 22 magazines gets expensive. I figured i would put my efforts into standardizing my parts and mag investment around the 457.
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 at the heel. I have never had an issue with it but alot of people report having issues with the spot welds on the magazines fail after high rounds counts. Also the way the barrel is mounted to mark ii the reciver makes it not worth replacing. Another thing to consider with the mark ii's is that the receiver is very long. My 457 with an 20 inch barrel is the almost the same length as my savage mkII with 16 inch barrel.
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.