I owned a D70. When it came time to upgrade, I considered the D80 but settled on the D60. Main reason? Size. I wanted a smaller, lighter camera body. I often chose not to carry my D70 because it was too bulky and took my Canon IXUS 70, instead.
Yeah, lenses are a problem and my old 70-200mm lens now has to be manually focused, which means I don't use it much.