Amazon.com has it for $159.99, what do you guys think? A couple of questions (I don't know anything about hard drives): It says it has "the luxury of no terminator and no device ID"? Heh? Also, what are the pros/cons of having an external power supply? A couple of the reviews complained about problems when putting the computer to sleep, and about noise. It's not necessary to keep the drive on all the time, is it?