The only brand that matters if you're going to physically abuse it is the brand of credit card you're paying for it with
Jokes aside, NO laptops are designed to be abused heavily in a physical manner, not even the ToughBooks (they got blasted about a year ago for not really being all that tough in real-life applications). Some models of laptops handle a beating slightly better for various reasons, mostly from design of the form factor and case.
Personally, I like Lenovo Thinkpads and Dell Latitudes. I think the case design is best suited for protection from what is considered traditional "heavy use" to a laptop (constant open/close, being moved around or transported a lot, picking up/setting down).
Here's a decent deal for a Latitude E5520. I would go with the described Core-i7 option that totals out at $639.
http://www.logicbuy.com/deals/dell-l...520/30288.aspx
However, if you're really that hard on laptops and there's no room to change that, then I suggest you go buy the cheapest bare minimum $350 job you can find, because there's no point in wasting your money if it won't last