I agree - hold out for a pair of Grands. But be aware, there are two Mozart Grands made by Vienna. There is the Mozart Grand that replaced the non-grand Mozart that your looking at. And now there is the Mozart Grand SE that replaced the Grand a few years ago.
I think $1100 is high for a used pair of non-grands. A few years ago, dealers were clearing out brand new Mozart Grands at 2K a pair.