Kahles, Schmidt and Bender, Night Force, is just splitting hairs. You will not be unhappy with any of those choices.
I have the Kahles 6-24x56. I love mine, and I'm sure I would have loved any other of the top line scopes. I only get FFP scopes for my high power rifles. I wish Kahles would make an MOA reticle for their 3-12X50. I have a 308 I need to scope, and I just like Kahles. I'm sure you will get opinons from people much more experienced than me. Shoot, I still use a Unertl Programmer in 36X. There that dates me as an old foggie.