I didn't want to take a chance and get a non-wd drive since I wanted to raid it with my existing WD 80 GB, so I ordered the OEM WD800BB drive dell had listed which came out to $109 shipped
Well, they shipped me the wrong drive, instead of the WD800BB they shiped me a WD1200JB :Q
Thats the 120GB model with the 8MB cache

And it's the OEM with the 3 year WD warranty.
Guess I won't be using Raid for now, besides this drive is about the same speed as a pair of 80 GB WD's combined anyways.