Pro 6 Pioneer price with vs without hard drives

Ok, that helps a lot...thanks for your quick help. I'll probably go with the RNDP6000-200 already populated with the enterprise drives if I can find one in Canada...I guess the ones already populated would be put thru a bit of testing to make sure it's working ok....I also want to order 2 extra drives just incase I need to replace a failed drive, so I'd like to know the make and model of the drives that are in the NAS...do you know which drives they are? I looked here http://www.netgear.com/images/ReadyNAS_Pro_Series_DS_26Apr1118-13987.pdf but couldn't see the drive models.