Want to upgrade to ultrawide monitor

[Vizzdom]

Hey,

long story short, I'm planning finally to upgrade from 16:9  to 21:9 (curved) and I'm in tough situation.

I don't want to spend much on my new monitor so I'm looking for something decent while also being cheap. Main purpose of monitor would be gaming (games like Diablo, Lost Ark, Total War, etc. maybe some shooters with friends)
Conclusion is battle between 4 displays.

1. AOC CU34G2X Curved
2. Xiaomi Mi Curved Gaming
3. Gigabyte G34WQC Curved
4. iiyama G-Master GB3466WQSU Red Eagle Curved

All of this displays are 21:9 with 3‎440 x 1440 resolution, VA panels, 1500R curve, 144 Hz
Because pricing is so close to each other, I was leaning more towards Gigabyte, I think it's just best from all 4 of them, any opinions? (It might be slightly biased opinion, because friend of mine has this monitor and says it's good and has no problem with it)

But yesterday I found out that in my country (Poland) there are a little more cheap options.

1. DELL S3422DWG (144Hz)(1800R)
2. HUAWEI MateView GT (165Hz)(1500R) (and with this there is 'bait' promotion to get smartwatch for free which is worth like.. 200$ plus minus? not like I need one, but hey, it's free xD)

I can't find tho any decent reviews of this 2 displays. Any idea if are they any good?
And my main and final question - which one of this 6 would you recommend? Or maybe you have any other good recommendation, I would appreciate any answer

[BuzzingBee]

Most if not all VA UW are similar and I generally would say get the one that is cheaper. However as I own AOC as it was one of earlier panel available back then, I would say avoid that one because of poor 60hz performance as it looked like the whole picture has motion blur. If I were to decide today I would go with Gigabyte but that's my personal preference. 

[Stahlmann]

I'd watch these 3 reviews and then decide: (I don't have one on the iiyama one)