I've been looking at purchasing a semi-automatic hunting rifle for some time now and I have tried researching the differences between the models but never managed to come up with much. I was just wondering if any of you fine folk out there had any input on which generation of the Remington 740 ('55-'59), 742 ('60-'80), 7400 ('81-'04), or 750 ('06-'15) was better or worse and why? Thanks in advance.