To fit the bill of a new semi auto .22 rifle that doesn't feel like a kids rifle............
That would probably be the $500, 5 3/4 pound , 40" long , 21" bbl, ~Remington Model 552 BDL DLX Speedmaster Autoloading Rifle.
Other than that, what you have is very popular.
p.s. Another full size .22 is Savage, who makes the 21 inch barrel Model 64G (wood stock) 64F (synthetic stock) 10 rd mag for $150 avg. I'm not recommending either of these rifle, just listing them for you.