Hello all, I just got my new Referbished Macbook Pro. Runs like a dream. My question is just, how hot is too hot? I know laptops tend to run hot (I'm used to that from my old Toshiba & iBook G3) but I just want to know if/when I need to worry about heat, especially since this computer is going to replace my tower as my primary computer (thus its going to be used a lot.) Thanks.