Thanks for the replies. I will probably just go with drywall. I have
24" centers, so I would need to use 5/8" drywall to prevent sag?

What do you think of priming and painting the drywall before I put it
up? I'd have to go over it again and paint the seams, and over the
screw holes, but I think it would be a lot easier than trying to prime
and paint 816 sq feet of ceiling that's 10.5 feet above my head.

I don't suppose paneling will work? That thin stuff that finds itself
on a lot of basement walls. It would probably sag?

Thanks,
-Ryan