Get a used Tamron 28–75mm f/2.8 zoom. They can be had for $200—$300. It acts as a 42–110mm on an APS camera like the D80. It focuses in the same direction as Nikon and has extremely close focusing.
It’s wide enough for group shots and wonderful at the telephoto end for portraits.
Go here and click on the Weddings and the Kids to see samples of how versatile this lens is on an APS chip.
The lens is sharp at f/2.8 and 99% of this work was all shot natural light at 400 or 800 iso. The large f-stop isolates the subject and throws the background out of focus with great bokeh. 67mm filter is cheaper and works with most modern ring lights too.
You may also want to invest in an ultra wide angle for church interiors or tight spaces. One of the 10–20mm or 12–24mm zooms should do well for these shots. Stick with the same lens brand and your color will be consistent between lens changes.