Q1: Laptop or Desktop? I'm gonna need this computer A LOT and I'm not sure if I'm up to the challenge of building a laptop, so I'm a little indecisive there.
Q2: Hard Drive? My parents don't wanna spend TOO much on this, and so no terabyte hard drives like I wanted...

Q4: Graphics Card? I want this mainly for the gaming aspect. Who knows, I may use this for school. But I want a good one, that isn't too expensive, preferebly one that can run Halo 2 and Republic Commando with no problems. That means no (I wanna say) Nvidia GPUs, cuz I'm pretty sure they has bumbp-mapping problems.
Q4: Which type of Vista? Should I get Ultimate or Home edition? I don't know enough about either to know which is better for my uses.
Q5: Dual Screens? I remember being told they're good for working and multi-tasking. That's what I'll be doing most next year, most likely. So I want to know if I should get it. And I have at least two extra moniters, so that part's no problem.