Hi everyone. I have a 2.13GHz White Macbook, bought the day before the white uni-bodies were released, and I have noticed with OS X Lion it has begun to slow down. I use my macbook mainly for web browsing, listening to music and editing photo's with iPhoto, Photoshop CS4 and lightroom. It has got to the point where i can only have one of the photo editing applications open at a time as well as a few tabs open in safari or the whole computer slows down a lot. What I am planning to do is upgrade the 2gb of RAM to 4gb and then install an SSD where the 500gb HDD is at the moment. I would just like to know how much of a noticeable difference that will make to the speed of my mac.