A:Answer Considering that the maximum distance from the center of the arm to the extended tip is just a bit less than 16 inches, in theory yes, you could use two 34 inch(diagonal measure 31 inch approximate horizontal width) monitors, but the position adjustment in order for them to be perpendicular to you might complicate things a little bit, since for the best viewing position you want both monitors aimed at an angle the would be perpendicular to you. so if the distance from the edge of your monitor to the center is over 15 inches it might not be possible to attain the best angle. In your case that the 27 inch monitor should be about 25 inches wide, you should be able to fit both 27 and 34.
