If it were me, I'd probably go with the monitors since it would nearly double the screen real estate.
You've got approx. 226" of screen area now with the 2 x 23" 16:9 monitors, but 2 x 34" 21:9 monitors would put you at approx. 420".
(As a side note, and I may be wrong about this, but if the new monitors have a higher resolution than the old monitors, wouldn't that reduce the load on the GPU due to reduced downsampling?)
Also, I had no idea that Brazil had ~28.5% sales tax... that's brutal :disgusting:
Life is like a box of chocolates, it doesn't last as long for fat people.
