In any case, I'm looking at the desk clamp, flex arm style mounts. Does anyone have any experience with these and multi display setups? Someone I mentioned the idea to said the he felt that the weight of the monitors (17lbs?) would cause the desk to lean/lift, which I don't agree with. I also think that I could use one clamp on each side and one on the back to give me a 3 monitor display.
Here's a pic of my current setup on my desk:

