The 2TB drive will be a boot drive loaded with W8.1 and a Linux distro of my choice (possibly Debian, Kali, or Mint)...
All the HDDs in my main rig are Barracudas... I have an external HDD with what seems to be a WD Green (might be a Blue... haven't cracked it open yet...)... but the controller on it is a bit conservative since it puts the drive into a standby (non-spinning) state after 10 minutes of inactivity on the drive...