Jump, I`d buy depending on your needs.
I myself bought a PC recently over a laptop. I have a marginally functional laptop right now, but it has several problems wrong with it, that would cost about what it`s worth to fix. In my experience, they break down a lot faster than desktops, since they do get moved around a lot, and the parts aren`t really designed for that kind of abuse.
I spent over $1200, but my computer can play anything, and since I built my computer, I also have the ability to upgrade it as games improve, and my monitor/keyboard/mouse are awesome. It also has a stable connection since I`m always hooked up, instead of attempting to connect to whatever connection I can find.
My laptop however allows me to take notes in my university classes, and check things online without having to go all the way home to look, which is bloody useful.
Overall though, it`s much better to have a desktop for gaming, and overall use, and a laptop for business like things such as notes. Using a laptop for gaming can work, but generally, it`s not worth the price. Especially if you want to save yourself from yourself, don`t put games on a laptop that you use for school :P personal experience.