Hello! Ill be buying a regular macbook pro and replacing the optical drive for an HDD. Now, I know that when you have only one drive, you should go for a 7200 rpm one. But in my case, since the OS wil be stored in the SSD, should I go with a 5400 rpm or 7200 rpm HDD? Obviously Ill be storing data there, but even though, wouldnt I benefit in any way from going with a faster drive? Ive also heard that 7200 rpm generates more heat, but would that happen if it's not the main drive? What do you guys think?