So my iMac and MBP could both use with a clean up after some time of fair usage. I plan to upgrade to Lion imminently so thought this was the best time to do a clean install. Do you have tips and recommendations to the following: Backing up my personal files, music and so forth, is all that is important to me, as I will reinstall applications that I want and let the rest go etc... I am planning to back these up to my MBP using 'Chronosync' via Firewire (most files are already synced) and then wiping my iMac and installing, SL and then Lion. I then plan to transfer back all the personal files and then wipe my MBP and install Lion. Again I will use Chronosync. Do you think this is the best solution, or should I consider Migration Assistant? I guess I am being thorough when I say I want to sync the bare minimum back, as to not transfer any garage or un-neccessary files from applications, or debris from times gone by. That said. I may be making more work for myself then needed? What would you do or suggest? Appreciate any tips, advice.