Agree w/Tireguy, but feel even stronger about it. If you want Maggies in a room that size, I'd size the 3.6 would also be too big, and would recommend the 1.6.
At 29" wide the most likely way to get the 20.1 to work is to put them on the long wall, edges about 3 ft. from side walls, leaving a sweet spot about 6 ft. from inside edge-to-edge. Not terrible, but far from ideal. The backs would also need about 4 ft from front wall, leaving you very nearfield, or pushed against rear wall. That would imply treatments on the back wall, in most rooms. Not to say this couldn't work for you, but certainly food for thought...
Cheers, Spencer