Hey! So I'm a designer and developer and I want to make the switch from my crappy Laptop to a iMac. I am thinking about getting a 21.5" iMac and then buy a second screen. I have a few questions on which I need some consulting on. I work a lot on Photoshop, After Effects and I do a lot of HTML & CSS coding. My Photoshop files can get big at some times. So, i dont know if I should go for the Intel Core i5 or i7? Also, would the Fusion Drive be necessary? I hope to get some good buying advice from you guys. Cheers, Patrick.