I have a marlin 981t .22 rifle, it shoots great for me. I have a 3x9x40 tasco scope on it that i bought from wal-mart. this scope works well (good groups), but it does not gather light adequately.

What would be the best scope made for a .22 that would work very well in low light situations?

I would like a 40 mm, but a 32 mm scope could work as well i guess. Also, is it best for the scope to have a 50 yard Parallax Setting or a 100 yard Parallax Setting?

Finally, is the 3x9 magnification a bit excessive for a .22 LR?

thanks