I just replaced my old Macbook with a new Pro i5 13". Does not have a SSD, and is completely stock. The problem is I am seeing a lot of the pinwheel when just doing some normal task. I have the activity monitor up and running on my dock so I can see how much of my processor is being used. It is never full, but I keep seeing the pin wheel. Honestly I probably keep this Pro until they release one with USB 3.0 next year. So I do not want to dump big money on a SSD when prices will probably be cheaper next year. Should I upgrade to 8GB of ram? I can do it for about 30-45 bucks with some deals I have seen online for Crucial. I see the pinwheel anywhere from 1 to 5 times a day.