I have a little red dot tasco on my takedown which has performed perfectly... One I dropped a scope on my 10/22 it was a Nikon Prostaff 3x9 and that was a great optic for the 22. I think you can drop almost anything on a 22 and it will work for you. They are just so easy to outfit.
i've got a cheap-o barska on my 10/22 and it's been spot on. like Dirtypacman already said, you could put just about anything on a 22 and it will work for you.