I'd skip the 3100; It's a decent enough camera but it's a bit of a toy SLR. I'd jump up a level and go for the 5100:
http://www.kenrockwell.com/nikon/d5100.htm
One of the reasons people choose Nikon over Canon is that you can get lenses from 40 years ago that will work on the most recent body, it's all backward compatible. Canon tend to chuck out their lens systems after fifteen years or so.
http://www.kenrockwell.com/nikon/d5100.htm
One of the reasons people choose Nikon over Canon is that you can get lenses from 40 years ago that will work on the most recent body, it's all backward compatible. Canon tend to chuck out their lens systems after fifteen years or so.