My two cents....also consider that the D90 is the heaviest body of you options.
Personally I think the D90 is great but has features like its video capabilities that I don particularly find appealing. For me if its too heavy is a camera I will not like to take out.

I prefer to go with one of the "consumer" type bodies which are lighter with the same if not better quality output with less weight and cheaper...the money you save you put it on a nice glass.