1920x1200 - High Quality
At 1920x1200 the frame rates are only reduced slightly compared to the 1680x1050 results.
The Radeon HD 6870, for example, has barely dipped below 60fps with an average of 57fps. The GeForce GTX 480 which is over two and a half years old managed 59fps, and the three year old Radeon HD 5870 was even faster with 62fps.
Current generation budget graphics cards such as the GeForce GTX 650 Ti and Radeon HD 7770 were good for roughly 40fps which can be considered as playable.