This may be a little premature, but I wanted to get some suggestions from folks who have done this before. I've decided that when Tiger comes out, i want to do a clean "format" on all of my Macs and do a perfectly clean, new install of the OS. My machines get used hard every day, and although I do force all of the daily, weekly and monthly maintenance (along with prebinding) I'd like to clean everything up. Am I being stupid about this? Should I just do an archive and install when the new OS is out?