I'm planning to buy a high-end (at least for me) .22 rifle just for plinking and informal target shooting at my local club. By high-end, I'm talking no more than $600.... I'm thinking I'd like to use open sites for a while, but I'll likely need to put a scope on it before too long... I'm 68 years old and I'm showing the beginnings of cataracts. I'm looking for your suggestions on which rifles to consider.