Disk setup dilemma. HELP!

Hello there,
Currently, I have 3 x 2TB HDD, 1 x 1TB HDD in my Mac Pro and here is my disk setup :
1 x 1TB 7200rpm HDD = OS and Applications
3 x 2TB HDD 7200rpm (RAID 0) = Everything else (Media, Projects, Exports, Previews, Media Cache)
From what I've heard and read, it is better to dedicated drives for certain files.
I'm planning to buy a 512gb SSD for my OS and applications (going to put this SSD in my 2nd optical drive's free bay). So I wonder which disk setup is the best for doing intensive editing in Premiere Pro and animations + effects in After Effects (currently using CS5.5 but planning to upgrade to CS6).
Here is my 2 setup that I have in mind :
Setup 1
1 x 512gb SSD = OS and Applications
3 x 2TB HDD (RAID 0) = Media, Projects, Previews, Exports
1 x 1TB HDD = Media Cache
Setup 2
1 x 1TB HDD = OS and Applications
3 x 2TB HDD (RAID 0) = Media, Projects, Previews, Exports
1 x 512gb (or 256gb) SSD = Media Cache
Setup 3
1 x 512gb SSD = OS and Applications
2 x 2TB HDD (RAID 0) = Media, Projects
1 x 2TB HDD = Previews, Exports
1 x 1TB HDD = Media Cache
Setup 4
1 x 1TB HDD = OS and Applications
2 x 2TB HDD (RAID 0) = Media, Projects
1 x 2TB HDD = Previews, Exports
1 x 512gb (or 256gb) SSD = Media Cache
Some say that I should also have a dedicated drive for exports as well. But if I use 1 drive for both exports and previews, it's still okay in terms of the read/write workflow isn't it?
So, which setup is the best for performance for editing and rendering in Premiere Pro and After Effects? Or if you have other suggestions, please do tell me as well. Please do help me because I'm starting a new project soon and need to set everything as soon as possible. Many thanks!
*NOTE : I have a 4TB external HDD for backups*
Regards,
Ash

Ash,
You state neither your processor(s) type or RAM here, however it is pretty likely that with the aresanal of drives that you have you will not bee too bottlenecked in the drive area. And too, various tweaks to how you configure your drives will probably not make that measurable of a difference. Certainly putting more drive power in the areas that you want to perform best could also be considered a personal choice in a sense. If you rarely export, don't put much in that area. If you export frequently, assign more / faster drive(s) to that task.
That being said, here's how I would start out if I were mounting your drives in a PC, assuming that your big SSD has decent write performance (at least 200 MB/s):
SSD - OS, programs, media cache, media cache DB
1TB - exports
3x2TB RAID 0 - everything else
I've got to qualify too that I have no clue how Apple deals with RAM and disk caching, but Windows 7/8 does a pretty good job of using spare RAM (not tied up by programs) for disk caching so that RAID 0 arrays can multi-task pretty well on simultaneous reads and writes. And, when you are doing big reads, RAID 0 really does provide quite a bit more kick than single rotating drives, even 7200 rpm models.
Regards,
Jim

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    This is what I have planned:
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    Cheers!
    Ps: And yes I am planning to subscribe to CC as its cheap for a CS6 owner. And then after 1 year will judge if I will continue with CC once upgrade pricing goes (hopefully yes as I wait for an extensively GPU using AE version soon).

    Regarding question #1, build list, and question #2 drive setup:
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    Regards,
    Jim

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    Message was edited by: n c h

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