NIKON d3100, d3200, d5000, d5100?

Out of these four, which of these would be best for me?

I was into dslrs about a year or 2 ago, i had a canon xsi for my first camera, then moved on to a nikon d5000 which was awesome, but sold it, and now want to get back in again.

help please, i'm somewhat a beginner to average shooter, I mainly shoot just general stuff but somtimes automotive/lanscape stuff. But in general,

i just want a dslr that i would have fun with and keep a long time to learn on more.

The $700 Nikon D3200 is one of the new generation dSLR's made by Nikon. It actually out performs all the other APS-C sensored cameras, Nikon or others

The canon 550d or 600d are quite good cameras i prefer canon over nikon but its all about personal prefrence its your choice but if you plan on doing some video get the 600d

All dSLR's are basically the same. The best is always the most expensive you can afford. It's that simple. To enjoy the dSLR, you have to learn to use it fast. The longer it takes you to do so, the more prone you are to frustration.