I too went with the D90 this summer. The bigger and more solid build than the 3100 and 5100 was a large factor. The in-body focus motor giving more possibilities of lens choices for the future was a plus too. I looked at the 7000 and it seemed closer to the 90 than the 5100 but the price was just outside my budget. I have no regrets with the D90 It is allowing me to get away from just snapshots and explore photography with out hardware limitations. The point that pushed me to the D90 most of all was the ergonomics. Hold the camera play with the buttons. If you have to look where the buttons are you aren't looking at your picture. The camera needs to feel right in your hands.
