I have (and love) a 20" Intel iMac and now want a laptop. Primary use of the laptop would be Photoshop CS3 (though rather large files) and browsing. Is the difference in the graphics card between a MB and my iMac going to cause considerable difference in performance if the processor speed and RAM are the same? Also, how much difference is there truly between the 2.0 and 2.16 MacBook? I know I can always upgrade RAM later if I need to, but can't change the processor. Trying to work on a budget and get the best thing I can for me for what I have to spend. Any advice is appreciated. Thanks!