what would be the best buy, not necessarily the most expensive, for a nite scope. i have seen many advertised that they use infrared to help with the view of the image, so does this mean that i will be able to see well in pitch dark, or will i have to be spending a lot of money for this type of scope. i dont want to have to spend a bunch, but i am just curious about what the best buy would be. thanks for any help.