After debating between the larger capacity of the Samsung 500 and the faster speed, lower power consumption, and lower price of the WD Scorpio Black 320, I finally went with the Scorpio. Because I have some experience working on electronic equipment, I decided to install it myself using the ifxit instructions. It was a bit scary, but the installation worked as advertised, and everything is fine. The drive is noticeably faster than the stock 200 MB drive. I have a few tips and a couple of questions:
The ifixit instructions call for a tool called a spudger, which is basically a small non-metallic spatula used for prying things without damaging them. After checking four local stores (including Radio Shack) where they'd never heard of such a thing, I came up with the wild idea of sanding down a popsicle stick. It worked like a charm.
As for keeping track of all the screws, I printed an extra copy of the instructions, and used Scotch tape to tape the screws to the pages at each step.
I'd previously purchased a WD Passport 320 and had been using it to clone my system drive with Carbon Copy Cloner, a process which took several hours. When I got the Scorpio, I popped the existing drive out of the Passport case, put the Scorpio in the case, cloned my system drive, took the Scorpio out of the case, installed it in my MPB, and put the original drive back in the Passport case. I found some instructions online that said you'll inevitably break off some tabs when you pry the Passport case apart, but I was extremely careful, and I didn't break anything. It did take a long time, though, to unseat all the tabs.
The next time I cloned my new Scorpio drive to the Passport, it took only 12 minutes, rather than several hours. I know the Scorpio is fast, but it can't be that fast. I assume CCC was doing a differential backup, rather than a full one. I didn't change any settings, but now I'm going from a 320 GB drive to another 320, rather than from a 200 to a 320. I wonder if differential backup isn't possible when the drive sizes are different.
This probably belongs on the "Windows on a Mac" forum, but when I first installed the Scorpio in the Passport case, I had to use Disk Utility to initialize it. I left Number of Partitions on the default setting (Current) and selected Mac OS Extended (Journaled) as the format. Yesterday, I tried to install Bootcamp, and I got an error saying that my system drive has to be a single partition formatted as Mac OS Extended (Journaled) -- so maybe Current wasn't the same as 1? -- and that if I'd initialized the drive using Disk Utility, I need to run Restore. So I went to the Restore tab in Disk Utility, and it asked me to select the source (disk or disk image) from which I want to restore. Okay, so what does that mean, exactly? Do I need to reinstall Leopard from my installation CD, and then restore my data from my Time Machine backup drive (I have both a cloned backup drive and a Time Machine backup drive)? How do I make sure I get my system drive to a state in which I can install Bootcamp and then Windows?