First let me say this, I'm a broke college student. Now, i'm looking to make the transition to shooting with a DSLR. A friend of mine has offered to give me his kit 18-55mm and 55-200mm from his D5000, since he has upgraded his glass. I've searched the web and I've found a D3000 body for around $300, and a D3100 for about $500. I wont have the camera for very long, I'm only trying to get familiar with using a DSLR before I invest in a better camera. The question that I have is the difference between the D3000 and D3100 that significant to warrant spending the extra 200?