So I have my eye on one. The price is right, however with some of the discussion of the earlier models having "illumination issues" I'm wondering if that's why it's priced the way it is? According to Leupold the "X" and "Y" serial #'s makes no difference. The unit is NIB, and from a decent retailer, just wondering if I should just "go for it" and not worry about the illumination.