I am thinking about getting a new 12" powerbook with 1.256gb of ram. The 1.256gb of ram is maxed out on the 12". My question is would a used with 15" be more beneficial performance wise since I could get more ram on it. I generally use photoshop and convert raw images to jpegs which bogs down my 550mhz 512mb machine. I can get the 12" 1.33ghz with superdrive and 1.256gb ram for just over $2000 with educational discount. How would a 1.25ghz 15" loaded with more ram compare? Which is more important ram or speed? Thanks