Have a question about hard drive setup to capture HD video. Spec'ing out a new machine per the following to edit my new Sony HC-7 HDV camcorder, photoshop, and maybe play a game or two:

Motherboard: Gigabyte GA-38-DQ6 (new X38 CHipset)
Ram: G. Skill 8GB (4x2GB) DDR2 1000 (PC2800)
Intel Core 2 Quad Q6600
Video Card: Geforce 8800GT with 512GB ram
Harddrives: 2 WD Raptors 36GB as Raid 0 for OS/System Drive (old),
Western Digital 160GB drive for general data storage/scratch drive (old)
New 2x400GB WD Harddrives setup as Raid 0 to capture video???????


For the Operating System, I plan to setup the Raptors in Raid 0 then partition them into separate drives to create a dual boot config with vista 64 and windows XP 32bit. XP is there really just for video editing due to all the driver issues with Vista 64bit OS.

What I'm worried about is some recommendations I've come across for 4 HDDs setup as Raid 0 to capture HDV files. I was only planning on getting two nice drives like the WD 400GB HDD setup as Raid 0. What solutions to capture HD footage have some of you found that works? Do you think the above hardware can get me by with two HDD in Raid 0 or is even that necessary for HD capture?

Thanks in advance,