I have a white 13"/ 10.6.3/ 2GHZ core2 duo/ 2GB ram and 48.02 available space . I redo documents and surf and read forums and the news and send e-mails . I use PScs3 to play with . Which of the new 13" or 15" would suit my needs . What I have now seams to work for now. My concern is with the updates I keep downloading will I have the memory and space for the things as time goes on ? To many choices with this new i5 & i7 . I don't understand them and need to read up on what they are . So what are your thoughts ?Thanks