Once again, for you .44 fans,
Arguments in favor of the .44 mag in this thread based on "power/energy" would compel one to get a .454 or .460 or whatever. Get whichever one makes the most sense to you. They are both good choices.
As for the "logic" above, anything your .44 mag can do my .454, .460, .480, .475, .500 can do better.