As far as your scope choice goes, don't go any heavier than a Nightforce scope as you will probably be carrying these rifles. Might want to concider the Leupold also to save a pound of weight.
As far as the Schmidt & Bender and the Premier, both are excellent scopes, built like a tank, but are going to add another pound of weight over the Nightforce, and will cost you another $1000.00
Basically weight wise:
Leupold w rings #1 1/2- 2
Nightforce w rings #2 1/2
Premier w rings #3-3 1/2
Personally, I have had Premier Heritage, Huskemaw
, and Nightforce. I still have the Nightforce .