In no particular order:
Ruger 10/22 - probably the overall best choice considering the popularity of the rifle and the sheer amount of aftermarket add ons, upgrades, etc. for it available. I love mine, the only thing original on it anymore is the receiver and the actual bolt.
CZ Lux - damn good rifles, great triggers and accurate as hell. I bought matching rifles for my girls when they were born and may have more rounds through them than they do.
Marlin 39A - best lever .22, ever. Accurate, smooth action and a damn good trigger.
M&P 22 - can set it up to be almost exactly the same as your AR, so you have the luxury of shooting quieter and cheaper with the same feel and functionality
Now, if you want to go older guns, some of the older Winchester bolt actions were about the best .22's produced in any given time frame. Henry makes the Golden Boy, which is a solid gun but doesn't fit me nearly as well as the 39A does. I have an old Springfield/Savage semi auto that is built like a tank and probably has a quarter million rounds through it, and it still keeps one shooting. The Remington Nylon 66 was one of the most popular .22's ever made as well and can be found with really not that much effort.