Hey, I'm new to photography and I'd like to start taking pictures as a hobby, not professionally. I was thinking of buying a brand new 3400 but yesterday an acquaintance offered me a used 5100. Which one do you think is best? I could save 70 bucks more or less if I get the 5100, but I don't mind paying more for the 3400 if its worth it. What do you think I should do? Thanks. (both cameras come with 18-55 lens)