Garage - Paneling or drywall?

Our garage walls are ready to be finished with either paneling or drywall. Several questions - which is cheaper to do? Which is easier? Which is quickest? I have some experience with paneling and it is fairly easy to work with - around light switches and things and I know I can get some decent looking paneling for around $10 to $12 a sheet. I know very little about drywall. After this is done we will drywall the ceiling - if that factors into your answers. Other considerations I am missing? Thanks!