I'm torn between the two. Each would have it's advantages. If I bought the D5000, I could get another lens. If I went with the D90, I'd have less cash to spend. I'm a student now, so it'd have to be mechanically worthwhile to go with the latter. What one would serve as a better camera for the long term? I enjoy taking night photos. Additionally, in a few years I'd purchase a macro lens to photograph teeth for work. The reason I'm posting this is because I've read so many reviews that contradict each other! Unless their is a reliable place where one can purchase a used camera that's a higher model, although I'm not sure where a place like this would be... Thanks in advance.