Add me the long, long list of satisfied customers of Garret's!
The whole process end-to-end could not have been more smoothly or professionally handled. Garret was always available with good advice, even when it wasn't specifically about the hard drive swap.
Also, a shout-out to "isubsmith" for the tip on using a needle nose vise grips to remove the stripped screws. I don't own a dremel and the cheaper grips route worked perfectly for me! Definitely order the screws from Garret -- totally worth the extra clams.
The whole thing is so cheap and painless, I cannot recommend it enough.