Which Mac should I buy?

For basic usage (a little photo manipulation, office apps, web surfing, and rarely doing video editing or gaming), the MacBook Air, MacBook Pro 13, and MacBook White are decent choices. The MacBook Pro 13 is going to have a stronger CPU where the MacBook Air and MacBook White currently have stronger GPUs. If you're going to be doing a lot of graphics work, video editing, or anything requiring a lot of power from the machine, You'll want to go with a MacBook Pro 15 or 17 with Radeon 6750 graphics (the 6490 in the base model MacBook Pro 15 isn't much better than the GeForce 320m in the MacBook White or MacBook Air, though it's still a step up from Intel HD3000 graphics).