I'm currently looking to build an AMD computer for gaming/occasional video editing. I've done alot of research on the parts I'm getting (i pretty much purchased them already), but I'm not too sure what power supply i should get (wattage, brand, etc). I was considering a 500/550W PSU for this rig, but I've considered overclocking in the future. What power supply should i get without going overboard. considering the following parts?
CPU: AMD Phenom II x4 980BE (@3.7GHz)
Aftermarket Cooler: Cool Master Hyper
Motherboard: ASUS M5A88-M (Micro ATX ; AM3+ socket)
RAM: AMD Memory Performance Edition (4GB x 2; DDR3-1333MHz) [might upgrade that to 2000MHz in the future]
GPU: Sapphire Radeon HD 6790
ODD: Lite-ON DVD Drive
HDD: Western Digital 500GB (6GB/s SATA)
Case: NZXT Vulcan Micro ATX case
I'm also considering getting a fan controller, card reader, and i might include some case lighting later on (additional fans with LEDs, cathodes, etc). Any help would be greatly appreciated.