I want to buy a second hand laptop for netflix and stuff like that. I have 3 options: I3-m830 / i5-m520 / n3710 (all of them have 4gb ram). So which who is better from this three cpus. i'm asking because i'm undecided . Because i don't know what to choose between an old high end cpu or an new entry level cpu . Sorry for spelling mistakes. BTW, these laptops have about the same price .