I have an 8710w and a HP 1.1 Docking station.
Another two 20.1' 1600x1200 Eizo L887 monitors connected. One via DVI and one via VGA both on the docking station. That's 3200x2400 :D
Make sure you have a good quality cable on the VGA part.
NB. You can't use HDMI out, on the laptop, and DVI out on the docking station. Dual digital is not supported by my Quadro 1600m.
Also, when connected to the dockingstation, the VGA out on the laptop displays a black screen, you have to use the VGA out on the docking station.