The 450 Marlin is a good round – an excellent round, in fact. Ammo availability may be an issue in your area so I would check on that.
The 1895 in .45-70 is more popular and with appropriate loads will do anything the 450 will do. My own hunting load pushes a 350g North Fork bonded bullet to 2183fps. There is a much wider range of factory ammo available for the .45-70 – from mild to wild – than there is for the 450 or even the .444.