Kain17.... If your planning to buy an XBOX, you can't tell, in anyway, what drive it has installed untill you void your warranty and open your xbox or use an exploit.
It seems that "most" units made in 2002 have samsung drives. I have seen a samsung drive in an early 2003 unit aswell.
I look for "REFURBISHED" XBOX's' that were made in 2002 and have been refurbished by MS and purchase those at a cheaper price. At the moment, they are selling here in Australia for $161.
Most have Samsung drives, but i have had 2 that had Phillips drives, so obviously they had faulty Samsung drives and hence why they were refurbished.
Sub