The Remington semi-autos have a reputation for being unreliable and with mediocre accurcy. The 750 may be better, but I wouldn't gamble on it. The Browning has a much better reputation for reliability and accuracy, but are heavy pigs that I wouldn't want to carry.
I have no experience with the Benelli rifles, their shotguns are superb however. They have some very unconventional looks that may take a while to get used to, and I don't know how they compare in price to the others, but if I were set on a semi-auto I'd look at the Benelli.
I like the idea of using a semi-auto hunting rifle, but I've found none of them can compare to a good bolt rifle. For a fraction of the money you can buy a bolt rifle that will be significantly lighter, more accurate, and with the most reliable and durable of all the actions.