Hey Everyone, I am first time poster here. I wanted to get some input from other macbook users. I currently have a white macbook (late 2009). My battery is pretty much gone, and I have been experiencing some lag while using it. I am thinking it is probably time for an upgrade soon. A friend suggested putting in a new battery and installing an SSD. I am just not sure if I want to invest the cost of both of those (which would probably be around $400) on a laptop that is almost 5 years old, and was pretty close to the base model when I got it. I am thinking of getting the 13.3 inch pro because I like the size. However, you can't get a quad core processor in the 13in. Do you think I would regret going with the dual core i5? My current macbook contains the following: 2.26 GHz Core 2 Duo Processor 4 GB 1067 MHz DDR3 Ram 320 GB HD Graphics: NVIDIA GeForce 9400M 256 MB I am looking at 3 options: Macbook Pro 1: 2.4GHz dual-core Intel Core i5 - Turbo Boost up to 2.9GHz 8GB 1600MHz memory 256GB PCIe-based flash storage Intel Iris Graphics Cost: $1399 Macbook Pro 2: 2.6GHz dual-core Intel Core i5 -Turbo Boost up to 3.1GHz 8GB 1600MHz memory 512GB PCIe-based flash storage Intel Iris Graphics Cost $1699 Macbook Pro 3 (Customized): 2.4GHz dual-core Intel Core i5 - Turbo Boost up to 2.9GHz (I could upgrade to the 2.6GHz i5 for $90 or a 2.7 GHz i7 for $270) 16GB 1600MHz memory 256GB PCIe-based flash storage Intel Iris Graphics Cost $1579 I know this post is kind of long, but any input that you could provide would be much appreciated. I am in grad school, so this computer would mostly be used for schoolwork (Lots of Microsoft office), e-mail, and general web surfing. I don't want to go overboard and spend tons of money that I don't need it, but at the same time I would like this purchase to last me the next 5 years or so.