ASUS P8Z68-V PRO LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
LG WH10LS30 10X Blu-ray Burner - LightScribe Support - Bulk - OEM
CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M2A1600C8
XFX P1-750B-NLG9 Black Edition 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS SILVER Certified Modular Active PFC Power Supply
Dump the velociraptor HDD for 2x:
SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
-1 for OSS, 1 for data. Better advised is to have a 3rd hdd for your scrap disk. Take a look at http://forums.adobe.com/thread/525263 if you're thinking of doing a raid array for professional video editing.
Graphics and case are fine. You could also get a GTX 560 Ti if you wanted to save some money rather than getting the Quadro 4000.
No I haven't heard about that. The guys over on the adobe Premiere Pro forums' benchmarking suite are all showing the i7 2600K in the top-rated tiers. I did read that using integrated graphics and quick sync was rendering lesser quality results than dedicated GPU, but you're going with the top of the line Quadro so you should be alright.
Do you have a link to an article discussing the flaw in current implementation with integrated graphics?