I do a lot of photography work and am considering a new iMac 3.5 Ghz i7 or waiting for the new Mac Pro. 90% of my work is in Lightroom now. I do use Photoshop, but rarely and typically for critical sharpening work or some filters that aren't available in Lightroom. I don't play games, I don't do much video editing (other than occasional home movie clips), and other than photography work, just use the usual apps (web browser, iWork, iLife, etc.). I've read that Lightroom doesn't utilize the graphics card, so seems like the iMac might be enough for my needs even though the GPU is not that great? Any photographers using the new iMac? Is it fast enough with Lightroom and Photoshop?