Very informative thread! Thank you!
I'm thinking about building up my own PC and didn't really know where to begin. Atleast now with this thread I have more of an idea of what components I'll need. The Motherboard and cases had me clueless. This PC would be used for mostly everything (Internet browsing, 3D rendering, level creating and max setting gaming mostly.
I have put together a list of components that I would like for my PC. Stuff like the Hard Drive and Optical Drive were just quick google searches.
Motherboard: GIGABYTE GA-P55-UD3L LGA 1156 Intel P55 ATX Intel Motherboard
CPU: Intel Core i5-750 Processor
Case: LIAN LI Lancool PC-K7B Black Aluminum/ SECC ATX Mid Tower Computer Case (Not to keen on it)
GPU: ATI RADEON HD5850 (Maybe Another one at a later date. SLI)
RAM: Crucial memory 4GB Kit (2x2GB) DDR3 Ballistix PC3-8500 RAM 1066MHz CL = 7 Unbuffered NON-ECC 1.5V 256Meg x 64
Hard drive: Samsung SpinPoint F3 Desktop Class 1 TB Internal hard drive
Optical Drive: LG CH08LS10 Super Multi Blue (Blu Ray drive)
PowerSupply: ?
Operating System: Windows 7 64-BIT.
Wireless Card: EDIMAX EW-7128G IEEE 802.11b/g PCI Wireless Card
I would appreciate it if someone could point out any potential errors with this set up and advice on what could be made better (within a similar price bracket). I'm not sure on which power supply to go for so any recommendations would be greatly appreciated (Lets pretend I have 2x HD5850'S).
I'm not to sure on the PC case either, with all of this under the face plate I'd like a case that screams "I'm Powerful!" prefably black and has enough space to house all of the above. I can do without all the flashing lights 
. Again I don't know where to look.
Thanks all!
Essay Pro