I searched around, so I'm sorry if this has already been addressed in another post. I would like to upgrade the HD in my iMac G5. So, I had it open today examining, and the connections look different than the HDs I'd seen before (though admittedly I hadn't looked at one in over a year...). What kind of drive is this exactly? Any suggestions on quality drives at good prices? The iMac is a Rev A 17" Thanks!