https://www.tomshardware.com/reviews/aoc-c3583fq-35-inch-curved-ultra-wide-freesync-monitor,4719-6.html
Review from 2016, where (at $600) it was given an editor recommended award.
Another review here:
https://pcmonitors.info/reviews/aoc-c3583fq/#Conclusion
At $350 (or even <$400), there's not too much in the 1080p Ultrawide space.
There are options at 1440p though.....
This Dell is 1440p 165Hz AND supports G-Sync. A very appealing offer for a 1070TI IMO.
https://pcpartpicker.com/product/CwgPxr/dell-s2417dg-238-165hz-monitor-s2417dg
There's also an IPS 144Hz 1440p display from Nexeus (?) but I don't know anything about the brand, nor can I find any reviews.
It's $430 but IPS 1440p high refresh rate is rare and that's a really good price on spec alone. . But I'd stop shy of recommending, unless I could find a review or something to confirm it's quality.
If it were me, I'd opt for the G-Sync 1440p Dell first, then the Ultrawide 1080p monitor second.