Woofboy13

Forget it... as much as I am an 21:9 enthusiast and I will never go back to 16:9 myself the truth is that 25 inch model is far too small for 2560x1080p, you need a 29 inches monitor for 2560x1080p.
 
There shouldn't even exist 25 inch variants if I'm honest.
 
If you can't afford the 29inch one then the solution is go with 16:9.

Id go for the 16:9 panel, FPS games are not always the kindest UI wise to ultrawide and 144Hz is a real benefit in games like CS:GO

As far as I am concerned all 21:9's are 75hz minimum... what model are you looking at?

Ultrawide is really useful in racing games, it gives you an advantage in Field of View. I use a LG 34um69g 75hz ultrawide panel and I used to play Project Cars 2 a fair bit until my xbox controller broke. The extra field of view available really helps when you're defending position. And of course the immersion is far better. Once you've experienced 21:9 you can never go back.
 
What are the prices you're looking at?

Personally I'd go for the 144hz, and I would recommend it too especially if you play FPSes.

Personally I would go for the 144hz panel. I made the beginning of this year and hallelujah it’s so beautiful haha

No one can decide for you. I feel like a widescreen gets me way more immersed than a fast refresh rate, and I could hardly use the fast frame to my advantage anyhow.

Wow, thank you so much for the detailed answer, helped a lot!