I want to build a new computer but I don't know much about computers. I already have a mouse and headset so I don't need that stuff. I am hoping to spend not much more than about $1300 with that including the operating system, monitor, keyboard and all the computers internal components. Any help would be greatly appreciated! But, like I said, I don't know much about computers so could you please be very specific in your answers or link me to a site with the computer build already put all in one place! Thanks!
That's a great build above. Here's some minor tweaks I'd make, which are main some different brands (to take advantage of deals) and addition of an SSD and upgrade to 27" monitor. I did not include KB and mouse because those are a matter of personal taste, IMO.
CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($169.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ Amazon)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($104.99 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($39.99 @ Newegg)
Storage: Intel 330 Series 180GB 2.5" Solid State Disk ($103.99 @ NCIX US)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($67.99 @ NCIX US)
Video Card: XFX Radeon HD 7870 2GB Video Card ($189.99 @ NCIX US)
Case: Corsair 300R ATX Mid Tower Case ($49.99 @ Newegg)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($53.99 @ NCIX US)
Monitor: ViewSonic VX2703MH-LED 27.0" Monitor ($239.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (64-bit) ($99.99 @ Newegg)
Add $50 because it used Microcenters price for the i5-3570K.
P.S. I Just noticed you said you are in 9th grade and you want it to last through college! That's like 9 years. That's probably not going to happen, but it will be a solid build for the forseeable future. I give any build today 5 years max before it starts to seem like a POS, though.