I tried to stack this afternoon and I agree with you, I like to see the other characters at a glance so I need to look at other options. I have a 24" monitor that I can set up as a second and move the 4 slaves over there but I'm a little concerned that with a 27" main monitor that it's going to require lots of head movement and I'll end up with a sore neck in about a week.

Are you using grid with Video FX? My video box on the master is so blurry it's extremely hard to tell who is losing health. Currently I'm questing with a pally/4 shammy so its easy to tell which one to click on to heal the pally ( the pink box ) but if any of the shamans were taking damage it would be extremely difficult to see in the video feed box.