ASUS has released a dual HD 5870 video card called the ARES with 4GB of GDDR5 memory that is a beast of a card with a whopping $1,200 price tag to go with it. What better way to house your top-end card than in a $750 Level 10 chassis from Thermaltake (also reviewed by OCC here). If your computer budget doesn't rival the annual GDP of a third-world country, then fortunately for you we have reviews on much less expensive hardware which you can check out using the links below.
Cases
Thermaltake's Level 10 enclosure @ Tech Report
Antec DF-35 Dark Fleet Computer Case @ Benchmark Reviews
Cooling
Prolimatech Armageddon @ Bjorn3D
Digital Photography/Video
Logitech HD C510 Webcam @ Rbmods
Motherboards
Biostar TA890GXB HD Micro-ATX Motherboard @ Legit Reviews
Speakers/Headphones
ASUS Cine5 5-Channel Speaker @ ThinkComputers
Video
NVIDIA GTX 280 SLI 3D Surround Experience @ [H]ardOCP
Asus ARES Dual Radeon HD 5870 4GB @ HotHardware
Miscellany
PCPer Podcast #112 @ PC Perspective