With all the nice used Marlin 44 and 357 rifles out there that are even handier, I don't see the need to buy one.
Need doesn't have much to do with the purchase of a second rifle. They do a few things better than lever guns, and visa versa.
The SS version is better in wet weather.
On assumption one hits the target with the first shot, I'm at a loss to see the superiority of a lever gun and I own several of the latter.
The 77/44 is lighter than the Marlin and probably more accurate if loaded properly.
You won't feel guilty if you turn your Ruger around and paddle the canoe with it.