If you really get fanatic about the .22 lr you might wanna take look at this site. A lot of 10/22 info as well as guys putting ridiculous size scopes on their rifles, at least thats my opinion. I think a 3-9X40 is plenty of magnification for the average person then it just depends on what you're willing to spend but what ever makes you happy run with it.
http://www.rimfirecentral.com/forums/index.php