Internal RAID 0 with 3 or 2 Drives

Hello, iv been snooping around the forums looking for info on various internal RAID set ups...
I do a lot of editing with FCP but a do a lot of complicated After Effects stuff too.
I am considering the following...
set up 1
3x 1TB drives, RAID 0
vs.
set up 2
2x 1TB drives, in a RAID 0
with the other bay used as a render drive.
my question is, with a three drive RAID 0 would my read and write times be faster or slower than a 2 drive Media drive and one drive dedicated to writing for rendering...
any shared experience would greatly be appreciated, or suggestions...
thanks
also i was considering the WD caviar Black drives, any good or bad expeirence with those?

Thanks for the links. i am considering this option...
sdd in the lower drive bay.
and some kind of raid with the other 4 bays... id like to do a raid 5 internally. is that possible without a controller, or how would i go about doing that?
i also had one other question...
i was thinking about getting this external LaCie 1 Tb rugged drive for my itunes, iphoto, you know things that do not have to do with current work, maybe finished projects(not project files but final renders), other private stuff.
my question is, would a 5400 rpm drive be fast enough for such tasks. like playing an uncompressed quicktime... the drive is only like 120 euros with esata and usb 2, but its only 5400 rpm. i like the OWC drives from the links you gave me, but i live in Berlin germany, and it would kind of be a hassel to ship all these drives... but i am going to the USA in like 3 months so i could wait if i need to...
any suggestions?

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