Question : Problem: PC for HD Video Editing

After some advise on a suitable PC for HD video editing, below is what I have been advised is a suitable setup. Please let me know any improvements etc without going overboard with price.
Motherboard: GIGA EX58-DS4 MB (GA-EX58-DS4)
Memory: 6GB CORSAIR TR3X6G1333C9 (3X2)(TR3X6G1333C9)
RAID striped HDD's: 2 x  1.5TB SEAGATE 41AS 32/7200/SAT(ST31500341AS)
1 x LGE GGW-H20L BluRay Burner,6xBD-R,2xBD-RE,3xHD-DVD,16xDVD+-R DL-LightScribe (GGW-H20L)
Video Card: 1 x GIGA 9800GT 1GB PCIE OC (GV-N98TOC-1GH) GST
Power supply: 650W MASTER MODULAR GST
Firewire: IEEE 1394B/Firewire 800 64 Bit Host Adapter Card PCI PN: PCI-1394B800
Case: 1 Black PC-A6010 Aluminum Chassis No PSU sku: LL-PC-A6010B
Operating System:  VISTA ULTIMATE COA 32/64 BIT

Answer : Problem: PC for HD Video Editing

1G video card will be faster than 2.