many users have more than one drive Just because of the reasons you mention.
Master/Slave must be correctly adjusted, and you need a 80conductor cable. If you decide to get a Pioneer, these like being the master. So put that at the black end connector of the cable with jumper set to master. Install the Liteon as Slave then.
Another alternative for the Pioneer (many people consider the 115 better than the 116, but this may change with newer firmware) would be a NEC/Optiarc 720x series drive.