Hello, fine photography forum friends! I'm looking to get my wife a DSLR for her birthday next month, and wanted to get some opinions from you, as my experience is limited. She has no DSLR experience, but is quite familiar with traditional film cameras from many courses back in high school and college, mainly on Nikons. As such, I have been looking primarily at the Nikon D3100 and D5000, and I might be able to stretch as far as the D90's price point. What are the real world pros and cons of these different cameras? I can read spec sheets and see some of the differences, but how do the technical differences translate into real world benefits? Thank you all very much for your time.