Hello. I would appreciate some advice on a potential purchase. I'm thinking about getting a 13" MBA and sell my old 15 inch 2.2Ghz MBP and possibly iPad to finance some/all of the purchase. Since getting the iPad my MBP has been collecting dust because of the size and weight. At home I have a 2.53Ghz Mac Mini which is my main computer and handles my workload fine. I would purchase the 13 inch and want to know what is best to upgrade (RAM, CPU, SSD). I'm trying to minimize the purchase price since cash is short at the moment. Will I see the best bang for the buck in a RAM upgrade as opposed to the CPU and SSD upgrades? Thanks for your advice.