d50 d3100 d5100 newbie help

Hi everyone, So I found my old D50 today (it had been missing for 7 years) and it is as dead as a doornail. I'd like to upgrade and have found a D3100 and a D5100 for sale. I would love to know how many of you think which one would be better for someone newish to photography: the D3100 or the...