I reccomend the Pelican.

It has 3-layers of 1.5" foam.

A solid layer on the bottom.
A middle layer (cut to the profile of your gun)
A solid layer on the top.

There's lots of foam between the pieces of the rifle as well.

They have a lifetime (you break it - they replace it) warranty and are tougher than nails.

As you can see everything is completely surrounded by foam.

The Storm cases are good too.

This is the cheapest place I've found them.
http://www.all-pelican-cases-4-less.com/detail_pelican_1700.html