I am kinda biased on this subject. As far as ammo availability, I would have to rule out the Weatherby right away. between the other 2, it depends what you want. If you are going to stick with 150 -180 grain, its a personal preference thing. The WM has an advantage when you go to 200 grain. Right now the WM has an advantage on availability, but I think tohe WSM will eventually get there. Personally I would go with the Win mag, but that might just e because I own one.. LOL