Nice pc build, Although I might suggest 2 smaller hard drives in RAID-0. Say maybe 2 750Gb or something? Other than that, I am jealous as to how you got that much money at 15. I'm 14 and I'm getting a new pc myself but it is not as good as yours(although my GFX cards come pretty close).
My new pc:
CASE: Thermaltake Armor Series VA8003BWS Black Full Tower Case w/ 25CM Fan
http://www.newegg.com/Product/Produc...82E16811133021
Hard Drive: 2 x Western Digital Caviar SE16 WD7500AAKS 750GB 7200 RPM in RAID-0
http://www.newegg.com/Product/Produc...82E16822136131
Monitor: Hanns·G HG-281DPB Black 28" 3ms Widescreen LCD HDMI Monitor 500 cd/m2 800:1
http://www.newegg.com/Product/Produc...82E16824254026
Video Card: 2 x EVGA 01G-P3-1284-AR GeForce GTX 280 SSC Edition 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready
http://www.newegg.com/Product/Produc...82E16814130368
Sound Card: HT OMEGA CLARO 7.1 Channels 24-bit 192 KHz
http://www.newegg.com/Product/Produc...82E16829271002
PSU: COOLMAX CUQ-1200B 1200W ATX12V / EPS12V
http://www.newegg.com/Product/Produc...82E16817159067
Speakers: Logitech Z-5500 505 Watts 5.1
http://www.newegg.com/Product/Produc...82E16836121120
Keyboard: Logitech G15 2-Tone 104 Normal Keys 29 Function Keys USB
http://www.newegg.com/Product/Produc...82E16823126034
Mouse: Logitech MX518 2-Tone 8 Buttons 1 x Wheel USB + PS/2 Wired Optical 1600 dpi
http://www.newegg.com/Product/Produc...82E16826104178
Thermal Compund: Arctic Silver 5 Thermal Compound
http://www.newegg.com/Product/Produc...82E16835100007
RAM: G.SKILL 8GB (4 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)
http://www.newegg.com/Product/Produc...82E16820231151
Motherboard: XFX MB-N780-ISH9 LGA 775 NVIDIA nForce 780i SLI
http://www.newegg.com/Product/Produc...82E16813141005
CPU: Intel Core 2 Quad Q6600 Kentsfield 2.4GHz 2 x 4MB L2 Cache LGA 775
http://www.newegg.com/Product/Produc...82E16819115017
Operating System: Microsoft Windows Vista Ultimate SP1 64-bit English 1pk DSP OEI DVD
http://www.newegg.com/Product/Produc...82E16832116493
RAID Controller: Rosewill Silicon Image RC-209-EX PCI External e-SATA x2/ Internal SATA x4 1.5G HDD Controller Card
http://www.newegg.com/Product/Produc...82E16816132013
CPU Heatsink: Tuniq Tower 120 Universal CPU Cooler 120mm Cooling Fan and Fan Controler/Heatsink
http://www.newegg.com/Product/Produc...82E16835154001
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Games
Crysis
http://www.newegg.com/Product/Produc...82E16832130014
Call of Duty 4: Modern Warfare
http://www.newegg.com/Product/Produc...82E16832133023
Crysis: Warhead
http://www.newegg.com/Product/Produc...82E16832130216
Far Cry 2
http://www.newegg.com/Product/Produc...82E16832138046
(I'm not bragging either I'm just telling people what I'm getting)