and it will be my first mac computer. im getting it for $200, so i think thats fair. its got Lion on it now, so from what i understand, i can update to Mavericks for free right? anyone running a mid 2007 with mavericks? speed still ok? my main desktop now is an old outdated Dell whos specs are about similar to the iMac's...maybe a little inferior to it actually. i will be running both machines in my house so i wont be fully ditching the PC. anything basic i need to know for my first apple computer? also, when i get it, i will want to do a fresh/clean install of mavericks. will that be possible from within the OS or can it be done via bootable USB?