I'm looking at the specs page for the MacBook Pro and it reads this... Your MacBook Pro comes standard with a 5400-rpm Serial ATA hard drive. Choose a hard drive with a faster speed for greater performance. Or you can choose a solid-state drive that offers enhanced durability. Basically suggesting that the HDD option has a performance advantage over the SSD, but is this the case? I always thought SSDs could read & write quicker because they use solid-state flash memory as opposed to hard disks. I want to go with the 256GB SSD but I want to know how it ranks in speed. Thanks!