Pelican cases rock!
After the airlines managed to ruin 3 out of 5 pieces of a luggage set I got at a warehouse club by: breaking wheels off, spilling hydraulic fluid, and tearing along a sharp edge, I decided to get something a little more durable.
I figure if they can break a pelican case, at least pelican will fix it.
Be prepared to spend 2x more for a case than you would for a regular piece of luggage, but, you get a lifetime warantee, hard shell which will protect your contents, and no zippers which can be opened with a bic pen. Also, throw a pistol in there and slap on some non-tsa padlocks and travel is good to go when you play by the regulations. You spend the money, but you only have to spend it once. If you want to save a buck get their hardigg-storm line. These also weigh a bit less too, so you're not so close to going overweight.