I have happily been using two old El Paso Weavers, a 2.5 and a 3X, one with their range finding dbl cross-hair. The notion of having that extra elev. of the lower hair for distance has some merit. All in all I think I like a plain duplex hair for general all round use, especially in low light. I have an old Redfield 3-9X with such, a fine optic, but dont really have a need for that much on anything for some time now since the Weavers, at similar power, are smaller and lighter than the Redfield set at 3.
I follow these posts about new (and pricey) glass, but no sense in these sitting on the shelf as good as they are.