Don't get fixated on the different models. A D3xxx will take just as awesome pictures as a D5xxx. The D5xxx series have a few more little features built in, but those are things you might not even use or need. My recommendation is try to spend less on the body and use the extra money for lenses, that's what makes the difference in image quality. I also agree with the above posts, if it doesn't feel right in your hands, you won't use it, if you don't use it, its a waste of money. If the D5xxx or D3xxx are too small, look at getting maybe a used D7xxx, they're a bit bigger and, for me at least, feel so much more natural in my hands.
Another reason to look for a used D7xxx is that the D7xxx series has a built in autofocus into the body where as the D3xxx and D5xxx need to have lenses with autofocus built in in order to use the autofocus.