I was running 3 15k 73GB in Raid0 before I moved the Perc5/i card to another machine. I am now running 2 WD 250GBs single platter drives in Raid 0 off the intel controller and I can notice no difference at all in speed and boot times. The benchmark is slower and I have notice no difference in applications speeds. If you havent gotten these drives I would go SSD. Just my 2 cents.