Hello, I'm running Snow Leopard on a 2007 MBP, with 2 GHZ ram. This is the computer I started college with, and so far, I don't feel the need to upgrade to a new one just yet ("she's" in mint condition still). I've been given a copy of Lion and here is my dilemma. I'm a little hesitant because, due to my systems age, I am unsure if it will cause a performance decrease that would ultimately warrant buying a brand new computer. I'd prefer to just increase the ram, but i'm curious if anyone is running lion on this mac (or a similar mac) that can tell me first hand if Lion is going to be detrimental to even the basic stuff (opening stock programs, etc). I greatly appreciate the advice.