A general rule of thumb when fitting a case with foam is that you want minimum 1" of foam around the edges for added protection.
I'd recommend any of the following cases for your needs.
Pelican Storm iM2100
Pelican Storm iM2200
All are available with pick n pluck foam with convoluted foam(egg crate) in the lids. All are also available in black, as well as the other standard colors offered by pelican. Also included is Pelicans lifetime warranty, which is tops in the industry. I've been dealing with these cases for over 6 years and have only replaced minimum parts(ie-gaskets, broken handle, wheel) and can only think of 3-4 cases that have actually had to be replaced via warranty due to damage! 98% of the cases we sell are used in the oil industry and are treated like pure trash!