The Revo drives are not faster than any good SATA III SSD in RAID 0, which is what some Revo drives are, two SSD controllers and a RAID chip. Plus you won't have TRIM on the Revo drives, which you will have on an Intel 7 series chipset board, with a RAID 0 volume of SSDs.
Another thing to consider is the new SATA Express standard is being introduced, which is SATA over PCIe slots. That should be much faster than the current Revo drives used in a PCIe slot. We may not see this for a while, but it will be better than the current Revo drives.
Finally, many mother boards won't boot from a PCIe card drive, so these drives are only good for storage.
I'm sorry, but I'm to lazy to Google that for you...