answer:First, “faster” depends on largely on what you’re using it for: graphics, games, 3d, development, music—they all have different requirements. As to which Mac to get, I almost always recommend getting the newest revision. Because of high resale value, in the end it’s usually the best option (e.g., you could sell the newest macbook for more 3 years from now). And you could through on the memory very cheaply (2 gigs is nice to have in os x). Also, there’s no reason to ever buy memory from Apple… it’s weirdly expensive. Always get the minimum and then add it yourself. crucial is one of many companies that sells quality mac ram for pretty cheap—and it’s super easy to install yourself.