My parents also have 2 window units that size in their house, and apart from looking good, they have proven themselves well over the past 30+ years. In addition, the insulation value of the panes is usually better than that of the frame.
We have three each of fixed and tilt/turn windows alternating. The distance between them is 1.30m each and the wall opening is 1.10m. It looks good and doesn’t stand out at all.