I just got a 5 year old G73s from a friend. It runs like a top and i have had little trouble after replacing the hard drives (2) and reinstalling windows. Finding drivers was a pain tho. What i want to know is how far can i upgrade this by replacing hardware. Can i buy the hardware used in the newer model for this one? How about the $2,999 rog laptops hardware? I just want to know how far i can push it. Also, is that a third spot for a hard drive? I am new to pc gaming so.......