From the look of it, whats anyone joy when sites get hacked? I want to be sure that OP does not keep money on any of this exchange sites because if he does, I am sure he wont be wishing for such misfortune to happen. If any major hack succeeds to the best of my knowledge, it is not about the direct impact on people whose investments are there, but the indirect impact on the price of Bitcoin which will mean loss of investments to many.
If an exchange gets hack, the price will plummet again and we all have a chance to buy more bitcoins at a lower price before it goes back up. In a sense it is good for those who want to buy more bitcoins at a lower price but in the expense of exchange sites and its customers. We should have learned our lessons by now that we should not keep our bitcoins on exchange sites and I am sure OP knows that very well.