Couple of options to consider:
If weight and cost are not major constraints, you can get an absolutely bullet proof case through Americase with compartments. Weight empty may be as much as 25 pounds and cost is almost $1,000. PM me if interested as these are at the prototype stage.
If you are more likely to want a medium duty case, Americase, Kalispel/ICC and Strong make lighter aluminum cases. Price is more in the $400 range (if that). A bulldozer or other machine could probably inflict damage but most traveling obstacles are okay. These can work on a compressed foam basis or have compartments. Americase is the heaviest at around 17 pounds and the others are substantially lighter flat cases. I dislike the cases with rods that go through hasps because TSA doesn't do a great job of getting those back in place. The counter argument is that the rod is fairly secure.
The two detractions for the flatter, lighter aluminum cases with foam only are that it is vital that one have a big, flat surface on which to open them or the contents can roll out. Second, the components inside may move if the case is dropped from a considerable height. These risks may not bother you.
I like the compartmented cases because I go through airports where TSA likes to open the cases and take components out for an examination. It is easier to get everything securely packed again by the TSA personnel if there is a compartment involved ime. There is some tradeoff in that less insulation is used of course to account for the compartments. With either of the heavy duty or the regular Americase products, this is not a big concern as the cases are stout.
http://www.americase.comhttp://www.orvis.com/store/product_choic...6217&bhcp=1http://www.strongcasebytnb.comThe plastic cases are the lightest and quite stout but not as sturdy as the aluminum in my experience. I would use them for shipping inside a box but not for travel. Just my opinion though as almost everyone I know going to South America uses them due to weight considerations. Pelican, SKB, etc. all make good ones. These tend to be a good buy in terms of price and being able to get one quickly.
All of the above benefit from an outer cover to protect the case but that does sort of scream guncase according to airport personnel.
For lots of gear, many swear by the Tuffpak products. Dealers use them to bring many guns to shows. The guns are first packed in padded slips and then put in the outer case. I find these unwieldy to move around. Their capacity might be good if one also packed more gear in one for a longer trip. Remember that the whole kit may have to be unpacked for TSA.