When it comes to hard drives, I recommend Western Digital. 2TB is a lot of space and the WD Black 2TB Performance Hard Drive is a fast drive available at a good price. It spins at 7200 RPM and has a 64MB cache. Keep in mind that 2TB is the pre-formatted capacity. As with any drive, you will lose space when you format it. For a 2TB drive you will lose 150-200 GB leaving you with 1.8TB.