Actually, I have come real close to buying a .450/.400 3" double a couple-three times, which is basically the rimmed equivalent of the .404. But each time I figured the price of the double would pay for another safari, a rare practical thought.
Did own one of the Ruger No. 1 .450/.400's for a while, but never took it hunting. Guess I'm just a .416 Rigby guy!