I just bought a 2007-era Core2Duo MacBook Pro -- My first Mac! I want to wipe it out + reinstall. I no longer have the restore discs. What is the best way to do this? A) Try to buy the restore discs online? They seem expensive! Any ideas for a cheap source? OR B) Buy the newest version of MacOS and install clean? Is this even possible? (I would prefer this option since I want to upgrade to latest MacOS anyway). Sorry for the nub questions, I come from a Windows world. Thanks!