Case:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811146075
Comes in black or white.
Motherboard:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157314
Processor:
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115077
Memory:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820178382&Tpk=8 gb pny xlr8
This memory is by a good brand, PNY, however, it is not to common in the memory market. I picked this memory, because it is faster than cheaper 1333 MHz ram, and has a heatsink for cooling the memory, like many other higher end memory sticks.
Hard Drive: Western Digital Caviar Blue 7200 RPM 500 GB
This Hard Drive is only $75, and this is a good hard drive, and most other hard drives in this price range are unreliable. It is also 7200 RPM, most hard drives up until $80 are only 5200 RPM. So, this is a great hard drive for the price, and for many people, all the storage you need.
Graphics card:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127610
Not worth squat for gaming, but great for 2 monitors.
Power Supply: Antec 450 Watts VP-450 12V
Pretty much the biggest power supply manufacturer, they are very common and very reliable. This is enough power for this computer, and a couple upgrades. This is a component commonly cheaped out on, even though this is the heart of the computer, it pumps out the power, and if it fails, nothing will work, but can be replaced, but cheap power supply’s have a big chance of frying, and making some of your components stop working for good.
Optical Drive: LG DVD Burner 24X
Not to much to say about this, it is from a good brand, fast enough, and cheap.
Operating System: Microsoft Windows 7 Home Premium 64 Bit OEM
Want to be able to play games, browse the internet, and do stuff? You need a operating system. Windows is compatible with nearly all games (Mac and linux only games and phone apps are pretty much the only exclusions), and Windows is the most populaur operating system in the world. You coud use a free linux distrobution like Ubuntu, but it isn’t compatible with all games.
Total, around $500.