User Accounts after Erase & Install

[jazzdog]

I was going to migrate from the backup, but I want to be sure of getting rid of the problems I've been having with the mac - it's running very slowly and locking up/crashing at least once a day. It doesn't appear to be a hardware problem - I've tried many things to narrow down what it might be. The last step was an archive & install, but that didn't help, so this time it's erase & install. If I migrate everything back at once I'd be worried that the problems would continue.