Hello, I am new to building gaming PC's and I am asking for help. Right now I am on a budget and plan on upgrading in a year or two. But for now I am looking for a decent 500$ gaming PC build, including an operating system such as windows 7 or 8. I don't need a mouse, keyboard, or monitor. It is fine to go a little bit over my price range. I am looking to play games such as Battlefield 4 (medium-high settings for smooth gameplay is fine) and League of Legends (100-140 fps.) Thank you for taking the time to read, please help!