Ok, maybe not as much on the GPU front, but definitely cheaper for the monitor itself :)
Also, it's more like 9%. 2560*1440 = 3,686,400 & 2560*1600 = 4,096,000.
I just placed an order - http://www.ebay.com/itm/130892638671 (fingers crossed that it arrives in one piece and doesn't have...