Not sure what you define as bomb proof. However, I would be more concerned with comfort. This is a difficult thing to tell someone else what would be comfortable to them. Since our arses are not all built from the same mold, you'll need to try a few saddles and determine what feels right to you.

I personally have 2 Brooks B17s and they are very comfortable. I massaged them with Proofhide when I first bought them and haven't had to do a thing since. When rain is expected, I cover it with a shower cap to avoid soaking the leather. They look classy and fit the definition of bomb proof in my book!