well, i can't really help you with the thief problem. If you're worried about people stealing your stuff, i'd hold off on buying something unless you have a place to safely store it.

From my experience, gaming laptops are always less powerful and more expensive than tabletop options. I think it has to do with the power supply and cooling. 

Not sure why you need 2 graphics cards. I'll admit that's out of my area of expertise, but back in the day you did that if you wanted to run 2 programs at the same time, or on different monitors. I think in most cases you're better off with one powerful video card instead of two, but don't quote me on that.

Also, what do you plan on playing? If all of your games are five years old, you really don't need that kind of hardware.