I just have two little pieces of info to add.
A.) Don't put it off too long to buy them because I heard that D.H.S. may put the kibosh on sales of NV equipment to citizens.
B.) When you do get them, Take a little time looking into the nighttime sky with them. Supposedly you can see all sorts of "stuff" in outer space flying around.
I'l expand on what I mean later if you want me to.