Wow - after reading this review:
http://techreport.com/articles.x/14380
on the new Western Digital's Caviar SE16 640GB hard drive I decided against the Samsung drive. The reason is because this is a two platter model versus a three. It actually rated higher than the Spinpoint in just about every catagory and it was quieter. The 500, 750 Spinpoints retain the 334 platters so there is quite a bit of wasted platter space, the WD has just two and should hold up longer. WD says the amount of cache makes little difference. They were out of stock yesterday at NewEgg and several vendors are actually selling them OVER retail, including CDW for $165 when they retail for $140. I bought two of them this morning from NewEgg for $129 each - 640 gigs is plenty of space for me and I love the all around solid stats presented in this drive review.
Mark