If you have an adversary that can afford to tie up 10k servers each capable of doing gigahash per second for 7.5 years go ahead and use a stronger password. And

If you have an adversary that can afford to tie up 10k servers each capable of doing gigahash per second for 7.5 years go ahead and use a stronger password. And while you're at it you better buy the best physical security that money can buy.