Thanks for the reply - I used Super Duper. So, did you wind up doing a clean install after finding that the boot times weren't changed much? While it is a pain, would you mind timing how long it take for your MBP to cold boot to appearance of the desktop? While not scientific, it will give me an idea of whether my MBP is actually affected by the problem.
I just timed my core i5 MBP (4GB ram) and it took 65 seconds from the press of the power button to appearance of the desktop. That seems substantially longer than what others are getting with the Momentus XT installed. I also have hdapm installed to address the spin down issue. Interested in hearing your experience. Thanks again!
EDIT: I decided to repair disk permissions from the Snow Leopard install DVD's disk utility -then timed it again. This time I timed it from when I first heard the chime to when the desktop appeared and it was 24.8 seconds. Interested to hear how this compares to other Momentus XT users who clean installed on the drive. Thanks!
~25 seconds seem to be pretty normal with XT. Mine take 18-25 on average from the chime so pretty much the same. Also it should be depending on what background applications to be loaded on your log-in. I load color calibration tool, dropbox and etc on my boot. If I kill them then the boot gets faster.
I made clean install and used Time Machine but I did repair disk after the install because I knew the loading time improved with my stock 5400rmp HD as well right after I purchased my i7 Macbook Pro. I haven't had spin down issue at all. It never spin down? I don't know. Battery life seems to be still decent and the temperature shows 32-35 degree on idle.