I currently own a Nikon coolpix L100 DSLR and would like to upgrade to a nicer DSLR with interchangeable lenses and a viewfinder. I am a loyal Nikon user but at my University I have the ability to check out multiple Canon lenses for free. I am looking at the Nikon D90 and Nikon D3000 models as well as the Canon EOS T3 model. If anyone has any suggestions for either brand or model they would be welcomed. Thank you!