I'm planning on buying my wife a 27" iMac (her first Mac) but I am not sure if the i5 or the i7 is the way to go. She is a photographer who uses a Canon 5D Mark II and does all of her editing in Photoshop and Lightroom. I intend to purchase Photoshp CS5 for her Mac. I've seen some threads that suggest the i7 will provide a significant boost in performance over the i5, yet other threads mention that the i5 is the better value and will perform just as well as the i7 when it comes to Photoshop. Is the i7 going to be worth the extra cash for PS CS5 and Lightroom? I'm also considering the addition of the SSD in the iMac. Would separating the OS and the storage onto two drives really make a difference in performance? And what about OS X and the lack of TRIM support? Thanks ahead of time for your thoughts!