After my last Buffalo excursion, I feel myself wanting another double rifle. After a lot of research, I keep coming back to the Kreighoff. I like the idea of the cocking safety feature, and the anti doubling feature as well. I had a Merkel 140 in 470 NE at one time that I had great results with, but for some reason I'm kind of stuck on the Kreighoff at this time. Thinking 450/400 or 470, but a 500 isn't out of the question. Talk me into or out of this rifle. And what caliber would you prefer?