http://www.nikonchat.com/nikon-vs-canon-vs-sony/

Question about Nikon D90 vs. Sony alpha5000?
I'm just a beginner in photography and going to school for that and graphic design. I want a camera it is a good entry level something that I spent in the long run, so when I become a freelance photographer. I recommended the Sony alpha500 but looking at the Nikon D90. Sony told me that the explosion was "best for the dollar" what is your opinion on the two and what would be best or what are the major differences. If I'm going to produce the same image quality of each of a Nikon Sony and get it for cheaper than mine as well do that. I was also looking at a Canon EOS 400D? Note that I have about $ 1,300 – $ 1,800 to spend on one. I want to do the best I can to last me a while and do a good job in free lance. I've heard picture quality never changes from camera to camera, but shutter speed, etc. that are different?
Get Nikon. It is the best http://www.amazon.com/gp/product/B001ENOZY4?ie=UTF8&tag=digitsy-marina-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B001ENOZY4 option
Canon EOS 50th anniversary