Lot's of folders can take punishment. First, some questions:
What is your budget?
Do you know specifically what types of "punishment" the knife will endure? (prying, batoning, hacking, verbal abuse, etc)
What are the carry laws in your area?
Do you have a preferred carry method?
Do you have a preferred style of folder?
*Edit* My gut reaction is, Spyderco Manix. Partly because I'm a Spyderco kinda guy, and partly because it is one beast of a knife.