HDD/SSD performance

I am going to build a new desktop/workstation with the most demanding task as gaming. The only component with performance issues lies in the storage segment. Currently, I am considering:

a. 1x Intel X-25M 160GB for the system drive
b. 2x Intel X-25M 80GB in RAID 0 with ICH10R
b. 2x Intel X-25M 80GB in RAID 0 with PCIe hardware RAID
c. 2x WD Velociraptor in RAID 0 with ICH10R
c. 2x WD Velociraptor in RAID 0 with PCIe hardware RAID

Which combination gives the best in both performance (random read/write department mainly) and system response?

In the long passed age, a SCSI adapter can help reduce the CPU attention from I/O and hence, give better system performance and responsiveness, can multi-core CPU with ICH10R/hardware RAID can have the same benefit nowadays?
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More about performance
  1. dont forget that SATA is half-duplex, and carries more overhead to PCI, if you plan to implement SATA based RAID go with the hardware raid, but would strongly suggest to go with SAS _PCIe ( SAS is full duplex) and 15K 300 GB HDD
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