Probably a stupid question

First, I will give specs.
HAF 932 coolermaster case
Zion 1000 watt PSU
ASUS P6T MB
12 GIGs Patriot 1066 mem
3, EVGA 260 GPU cards
5, 1 Terrabyte hard drives
Blue ray DVD
3, 25' monitors, for 3D

I have built 4 i7 systems, This one I want to build for gameing. I want to know about A RAID setup.
1. If I run a RAID, is there any advanages
2. What setup should I use (I am thinking about a 0+1) I am new to this and want to know more on this subject.
3. How do I go about setting up such a system

Thanks in advance.