I highly recommend the .480 Ruger. From the bench, at 100 yds I can group three shots in less than 1 1/2", better if I twitch the same three times in a row. Recoil is not real bad, but there is no question at all when the charge is ignited. 325 gr Gold Dot, 26 gr H110 and a bang flop at 70 yds on a buck last week.
Having said that, all the choices mentioned are great. The cartridge you practice with, and have confidence in is the correct one.
Lee