Hi, I'm looking towards upgrading my wife's 2008 13" Macbook with a newer model, specifically one that can handle Adobe Photoshop CS5 with no problems. She likes to edit photos and add layers / textures to them. She does not do 3d graphics or heavy video editing. I'm currently looking at the base Macbook Pro 13". Will this be sufficient, or should I go for the 15" with the quad core and dedicated graphics card? Screen size is not an issue since she already works with a 13" screen and just plan on buying an external monitor if she wants to work with a bigger screen, so its really the internals I'm concerned with. thanks in advance for any replies!