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If you like the idea of hard case luggage to protect your belongings when you travel, you're probably best off with Samsonite luggage or some other mid-priced brand. If you have a specific need to protect important professional gear on the road, it may be worth looking into the Porter Case.
Recommended by photographers, computer users, salespeople and beauty professionals, this range of hard-sided luggage is very tough. The foam cases come with layers of foam which can be cut by the user to protect specific pieces of gear, such as camera lenses or A/V projectors. All cases, even the under-seat ones, come with "hidden" handles which allow the case to be wheeled through an airport.
There is, of course, a price for this strength and flexibility. The only question is whether the things you're transporting are worth the extra cost.