ok, i think im getting rid of the RAID 10 concept and moving to a 120SSD-Sata3 + 2TB-Sata3 ( including case upgrade for the 800d )
its seems like the power consumption + speed will benefit greatly from the change

so my disk arrady will be :
1. 120SSD Sata3 for OS
2. 2TBSSD Sata3 for Data
3+4. (optional since i already have some to spare) --> RAID 1 for 2x1TB Sata2 ( this will be "my documents" + backups )

i might use 2 of the black caviars ( 500's ) for my documents

**this is becoming expensive !

SECTORIX.