Purchasing new 5box computer

[Pycno]

This computer setup will be used for 5boxing with innerspace, and singleboxing with EyeFinity 3x1920x1200 displays. I intend to overclock the i5 to 4,0Ghz with the H50-water cooler to keep the cpu from melting too much

Ill run 2 cores on main window, and the other 2 cores will run 2 slaves each on low gfx settings.
When singleboxing I will use a second computer to run the slaves.

Question: For multiple SSD's, is it better to put them all in Raid-0 and have OS+Data folder on it, or should OS and Data folder be on separate drives?

Anyone got thoughts or input on this setup?

http://www.komplett.no/k/shoplist.as...1-AEB5A74C0272

(Norwegian shop, 15,385NOK = ~2600$)