34" Utrawide 3440x1440 60hz or 2560x1080 144hz?

[fairbaisa]

Hi,

 

I mainly use my pc for autocad, sketchup and gaming, which one should I get?

- 3440x1440 60hz http://www.lg.com/uk/monitors/lg-34UC88

- 2560x1080 144hz http://www.lg.com/uk/monitors/lg-34UC79G-B

or

- 3440x1440 100hz http://www.samsung.com/us/computing/monitors/curved/34--cf791-wqhd-monitor-lc34f791wqnxza/ (But, it's quite cheaper, why? Any minus?)

 

My setup :

Core i7 6700

16gb RAM

GTX 1070

 

Thanks!