Hello all, I have been waiting for the iMac for a while now and I have a few questions: First of all, I want to get a 27" i7 with best GPU available. My questions are: 1) should I get the apple SSD? (if no, where should I buy another one and is it hard to install on my own, I don't care about time, I mean difficulty). 2) should I upgrade the ram? 8gb? 16gb? and is it worth it? If you are curious as to the use of the machine, it'll be for image editing, sound mixing (high quality WAV files) and some gaming. Thx for your replies!