I'm curious if anyone has used Target Display Mode extensively. Are there any down sides to this? I want to use it to switch back and forth on my iMac and my gaming system. Right now I'm using an Atlona DP-400 and running SLI GTX580 graphics cards for gaming. So far it's magical, just scared I will damage my iMac. It's kind of like having a monitor that happens to have fans in it and is a mac.