I just picked up a new Western Digital SATA drive last night at Best Buy and it's the 250GB model but it costed a little more than the prices I saw online for it. Then, when I got home, I noticed that it has 16MB Cache and the drives that I saw online have only 8MB. I also noticed that the Mac Pro I bought came with the 8MB version. What is the difference/advantage of the 16MB cache vs. the 8MB? Also, should I be running the new 16MB cache drive as my boot drive since it has the spiffy 16MB Cache? (Whatever it means). Cause I can easily create a disk image of my current drive and copy it to the new one and swap places, then erase the 8MB Cache drive. I hope I'm making sense to y'all. I'm assuming that 16MB is faster than 8MB, so I'd probably want to run the faster one as my boot drive, no?