[rfuerst911sc]

I am almost at a point to install a ceiling in my two car man cave. The garage is 24 x 26 with a white/black checker board vinyl tile floor. The walls are 4 x 8 wood panels painted semi-gloss white. I am thinking about installing tongue and groove pine planks for a ceiling. My rafters are 2 ' on center. Currently everything is open so a blank slate to work with. If I go tongue and groove I'm thinking about using 1/2 " thick by 5-6 " wide to help keep down the weight. I think I would spray on a urethane/varnish top coat before installation and keep the natural color ( no stain ). What type of air nailer/nails for a ceiling install ? And would you use any glue/construction adhesive ? I'm thinking on the end/butt joints to glue and nail precut pieces of 1/4 " plywood on the backside to keep them from moving or separating. Lighting will be conventional track lighting with LED flood lights.
So first off any concerns with this approach ? Other than conventional sheetrock what other choices are out there ? I know some have used corrugated metal but I think that would over power the space.