Hi, I'm sorry if this is the wrong category. I plan on building a gaming machine that can hold Call of Duty, Need for Speed, and more. But anyway, I've done research on desktops that can do this task. I looked at Best Buy, a worker showed me the HP Pavilion Desktop with the AMD Radeon HD 8570D graphics card. And AMD A-8 series 3.5 GHz. Then I looked at the Alienware X51 i5 series. I'd like to know if the money is worth it (3.30Ghz, and I'm 13 years old, obviously I'm not old enough to have a job, you see my predicament). I'd like the parts that are compatible with the Intel 4440S. Or if I should use AMD. If you can find the info I need or even more, thank you. P.S. I'm new to this site.