Richard, yep - I'm hip on the takedown soft cases. Leaving an old shotgun together and full length inside of a soft case to have other stuff packed on top of it in the back of a Cub sounds like a broken stock disaster waiting to happen.

I'm kind of partial to Pelican cases (1750 & 1700), that's what the military uses and they have a great warranty.

Gun Case
 

I don't have one, but have read good things about Ziegel Engineering and they have a case that fits in the bottom compartment of a Boyt bag.

http://www.ziegeleng.com/pg5.htm