Seems to me that so long as you've got a PCI or PCI-e slot free that you don't see being used in the future, the addition of another 4 * 3Gb/S SATA ports FOC is a winning solution. If you MOBO ports actually are all ok you end up with 8 ports available.
A question though: On the ASUS® P8P67 PROand DELUXE, I thought that the MOBO had only 4*3Gb/s (Intel), plus 2*6Gb/s SATA ports (not Intel). Are ports 0 and 1 actually the 6Gb/s ports or have another 2*3Gb/s ports magically turned up that aren't in the on-line specs?
A question though: On the ASUS® P8P67 PROand DELUXE, I thought that the MOBO had only 4*3Gb/s (Intel), plus 2*6Gb/s SATA ports (not Intel). Are ports 0 and 1 actually the 6Gb/s ports or have another 2*3Gb/s ports magically turned up that aren't in the on-line specs?