Hi! I have ordered an SSD and it will be placed into the mainbay. The standard HDD, which came with the system, will be put into the secondarybay via caddy. As the standard HDD is kinda slow and small-ish (5400rpm, 320gb), I have been thinking that I should maybe upgrade it too. The question is: what kind of HDD should I go with? The MBP model I have doesnt seem to support SATA3 in the secondarybay so SATA2 should probably(?) be the way to go. Also should I buy a faster 7200rpm HDD or stick with a slower 5400rpm HDD? Will my MBP actually be able to take the advantage from a faster HDD or will I just be burning money for nothing? Its an early 2011 MBP with 4GB of RAM. What are your thoughts? Thanks!