Though you guys might find this interesting.
In addition to my Samsung 840pro as a boot drive, I bought 2 mechanicals for games and data storage.
I got a 2Tb Caviar Black to use for games and steam library, and a cheaper 2Tb green for general file storage.
Was benching the new rig today and found something surprising, and makes me feel a little cheated even. The cheaper green actually benched higher than the more expensive black! How did that happen?

The black is a WD2002FAEX


The green is a WD20EZRX


As you can see, apart from a slightly better access time, the green was a bit faster. For the price difference I was expecting the black to be way better.