I've got a 23" HDMI TV as a main display that usually has the scene and parameters tab on it

The 19" 16:10 then has the content library, align and surfaces tabs and the 17" 4:3 has the scene tab, D-Form and render settings.

The colour on the two (cheap) VGA monitors is way out, so I was going to buy two 23" LG monitors, a dual monitor VESA mount stand and run all 2 through DVI from my ATI 6870 and use HDMI for the other.