I have 6 muzzleloaders which 2 are savages,and I take at least one of them about everytime I go to the range which is one to three times a week,they are really fun to shoot and accurate,easy to clean,took one to the range 7 trips to see how it preformed with out cleaning (except checking the breech plug and vent liner to clean the threads and put on new greese to make sure it didn't stick)and still had very good accuracy after the 7 trips.You can shoot either powder in the savage.
Have a encore too and it really shoots to,so all the ones you mentioned are very good rifles and which ever one you choose should do fine.