Final build opinions (assembling tommorow)

I am preparing to assemble my new build and wanted opinions on my choices. I will be using my system for light gaming, M/S Office applications, internet, watching videos and occasional CAD work. I designed the build to allow for future upgrades.

Motherboard: ASRock Z68 Extreme4 Gen3

Processor: Intel I5 2500k

CPU Cooler: CM Hyper 212 Evo (Arctic Silver 5 compund)

Ram: Corsair Vengance 8GB (2 x 4GB) 1600mhz CL 9-9-9-24 1.50 volt Low Profile

Case: Antec 300

Power Supply: PC Power and Cooling Silencer 620 watt (80 plus certified)

Hard Drive: Western Digital Caviar Black 1TB 7200 rpm 64mb cache Sata 6.0

Video Card: ATI Radeon HD 4550 (reusing an old card until I can upgrade to something current)

Operating System: Windows 7 Ultimate 64 bit

Optical Drive: Liteon DVD burner


Future upgrades will include a SSD for the operating system and a new video card (possible SLI/Crossfire configuration)

I will be reusing the following: mouse, keyboard, monitor, printer and video card (as stated above)

All of the parts listed have been purchased at my local MicroCenter, so returns or exchanges can easily be made if neccesary.