Are the S&W and the Ruger lever action? If not Henry, then which brand? Winchester?
My 460 S&W is a TC Encore single shot.
The Ruger 450 BM is a bolt action.
Marlin still makes the 44 mag, 444 marlin and 45-70 lever action. All the bad press on the new Marlins I feel is internet BS for the most part. Remington owns Marlin and I can't see them sending out knowing bad rifles. IMHO
Older Marlins are available on the used market.
Or since you have a AR you may go with the 450 BM AR upper.
450 Bushmaster new upper with magazine on Gunbroker is $600. Since non gun can ship directly to your house.