I have a Bushnell Rimfire scope on my 10/22. It's an inexpensive ($52 from Wholesale Sports) 3-9x32mm scope with parallax set at 50 yards. Nice clear glass, at least in daylight, and holds zero very well. I had temporarily mounted it on a rifle in .308 Win caliber and it has no problems with zero or tracking. I haven't used it in low light yet, so I'm not sure how it performs under those conditions. The main thing to look for is the parallax setting. With 22LR you're shooting in close, so a closer parallax setting helps minimize parallax error. The other option is a scope with adjustable objective (AO), which is basically adjustable parallax setting, but it may cost you more.