I'm planning on doing a clean install of Lion when it is released. There is a few different ways to do this and I wondered which you think would be the best/fastest? I'm currently on SL. 1. Restore the .dmg in the Lion app to a USB and boot from it, wipe the drive and install. 2. Make a partition on my internal drive, install Lion on it, boot into lion partition and delete the SL partition (does this work without any issues?) 3. Boot from my external SuperDuper backup (SL) and wipe the internal HD and then install Lion from the default app. Not really an option but I put it here anyway: 4. Clean install SL and then upgrade to Lion (takes too long time).