[Punisher454]

I must admit that years ago Jeff bridges didnt seem quite right. But now 10 years later and after seeing him in the new TRON, I think Bridges could pull it off quite well.
But let me ask you this, would you want to play one of your dead fathers characters? Some people might not want to go down that path.
But there are really quite a few actors that would be a good fit.
One of the early posts in this thread mentioned Michael Ironside. His performance in Starship troopers is one of my all time favorites.

Really the hardest person to cast would be Adama.