should i get as iv been wanting one forever and now that pc world has a buy it now pay in a year deal on i can afford one, since i have a year to save up lol. i dont really care about hd space too much as i store all my movies and games and what not on an external drive. i read somewhere that you can upgrade the ram to 4gb on certain models, this is very appealing to me as the more speed the better. not including the mbp's what is the best macbook i can get for my money speed and power wise?