Which raid array is right for me?

[bbEmoney]

I wanted to know which raid array would be right for me to use. I want redundancy but I also dont want to use half of my drives as just a copy.

My Rig
Core 2 Extreme X6800 Conroe 2.93GHz
Kingston HyperX 4GB 240-Pin DDR2 SDRAM DDR2 800
6 Western Digital Caviar RE2 WD5000YS 500GB 7200 RPM
2 ASUS EN7950GX2/2PHT/1G Geforce 7950GX2 1GB
ASUS 90-C1CHFA-HUAY1 PhysX Processing Unit 128MB
ASUS P5N32-SLI Premium
PC Power & Cooling Turbo-Cool 1KW

 

[HauntFox]

Probably RAID 5, but you need at least 3 drives.
There's more info here: http://en.wikipedia.org/wiki/Redundant_...independent_disks#Standard_RAID_levels