Have you seen these?
http://www.ebay.com/itm/M-NT68676-2A-HDMI-DVI-VGA-Audio-LCD-Controller-Board-DIY-Kit-Power-Adapter-/121059321784?hash=item1c2fb2a7b8:g:4AUAAOxyjNlRym3z
I've wanted to try this as a budget muti-moniter setup for the exact reason you're looking for. A hardware monitering moniter. You give them the model number of your screen, and they flash the device for your specific screen, then it's just plug and play.