I have a 2009 15" 2.8 Macbook Pro with 4GB of RAM. I shoot photography for a living, mostly relying on Photoshop and Aperture for all of my work. I use my laptop alongside a PC desktop with an i7 and 8GB RAM. I am thinking of going completely mobile and am going to sell my PC desktop for $1000 so I have $1000 to spend on new stuff. Should I sell my 15" laptop and upgrade to an 15" i7 with 4GB RAM or should I purchase an 8GB kit of RAM for my laptop right now and hold off on the i7 upgrade? Will RAM in the 2009 macbook pro work in the new 2010 macbook pros, should I upgrade to the i7 model in the future?