Are there performance and other advantages/disadvantages to an archive and install vs a clean install (with prior data backup/post install migration)? I am assuming that fresh install is the same as clean install. I have a 2.8Ghz iMac. I would prefer to archive install and wipe out the old system folder rather than back up, re-migrate photo and music libraries, etc., but not at the expense of performance. Also does this mean pulling iLife of my iMac restore disks too. Is all that worth it? I don't plan on choosing the straight upgrade in case it damages the system files/hangs/etc. I know this may have been covered by some polls early in the weekend, but I wanted to see what people's experience was now after some time had passed.