Here we go again!
There is no BEST .22LR firearm, either rifle or pistol. There are some that are better and some worse for every particular use. Your 10-22 isn't the best benchrest rifle, or the most accurate sporter, or the lightest or the heaviest.
It's a darned good compromise rifle that people can keep as-is, or make into whatever they want a semi-auto rifle to be. It's the best for that, just because there are so many after-market products out there.
It may be the BEST rifle for you...at this time. Everyone should have one, some should have more than one, but I wouldn't be happy without my Rem 504 bolt action, or my Winchester 69A, or my Rem 521T, or my Winchester 52C, or_____, or _____, or______ etc.
Get the picture?
Picher