The Asus VH232H with the ports HDMI, DVI, VGA won't work?
The Asus VH232H will work fine. one of the requirements of running three monitors is that the 3rd+ monitor MUST use display port (with the exception of the sapphire flex cards). In your case you would run 2 monitors off DVI/HDMI. then get an ACTIVE mini display port to single link DVI-D adapter to connect the 3rd. They are about 30 bucks.