Mac Forums

I am a sophomore in HS and I want a Macbook Pro that I will use throughout HS and college. If anything, I'll play The Sims 3 on it but that's unlikely considering I'll be broke by the time I finish paying for it. I might do editing on it later on. Is the 13" or 15" better? The reason I was a Macbook Pro is because I can carry it around easily and its better than a PC in my opinion. I don't know what I should get in terms of GB and RAM. Thanks!