Aglifter,
I have some bad news. It has been my experience with night vision that going with anything other than the Generation 3 is a waste of money. Unfortunately, Gen 3 is still expensive. With optics there is a saying, "Good optics are not cheap and Cheap optics are never good". A decent night vision riflescope is still going to cost you over 2K. I know that is not what you wanted to hear.
Others will have more information for you I hope.
Mike