Hey there, you're in a similar dilemma that I was in awhile ago. So, I'd like to share my thoughts and what I did. I used super cheap TN panels with poor color and response times that werent very impressive and eventually got a 1080p IPS Asus PB238q. It was absolutely stunning, WoW had never looked so good. I wanted to try 1440p. Months of debating the risk of a Korean panel. Thankfully Acer released a 1440p 25 in IPS display for under 300, currently $200 dollars on newegg. Which is super cheap! I've been running these two IPS monitors and enjoying the experience, but as a higher level CSGO player (DMG), it's undeniable how much improvement can be made with a 144hz 1ms response time. I picked up the 144hz 24in Acer monitor for 170 (without freesync or gsync). CS is an easy game to drive, GPU can run it at 144 frames at max, if not you can just lower some settings. So, what have I learned? 144hz is nice, you will notice how nice your mouse tracks and how responsive it feels, the mouse really feels like an extension of you. But a good player is still a good player, I've been fine playing CSGO on my IPS with slow response times and 60 frame lock with great results. The colors may actually make certain scenarios better for me?
I find 144hz helpful in LoL too. WoW, doesnt really matter for PvE, you are usually prepared to move before something even happens. It will depend on your most played games. From my quick impressions of you I think you'd be best with an IPS 1440p panel. The 25in acer is probably the cheapest choice(and safer than korean panels), but doesnt have vesa mounting, has poor menu operation, and overall feels cheap (minus the panel itself.) I like the high PPI, but if you need to downgrade 1080p for certain titles
the smaller screen size keeps the pixel density decent.
But I can also agree with the argument of saving and buying a really nice g-sync or free-sync IPS panel capable of higher refresh rates. You get the best of both worlds and monitors do last you a long time. Linus has made a great point that monitor technology is growing very quickly, it seems every month there is a new "best gaming monitor." So you may want to wait even longer. You may be a fan of ultrawide displays like Linus. Maybe 2560x1080 would suit you well. There is a lot to consider. A lot of things become a personal needs/desires. What I hear is budget, casual, a desire for nice colors, and I think for $200 to have the option of 1440p (if you're comfortable enough with ~ 30fps in some really demanding titles at 1440p more power to you.) If you've never used IPS, almost any IPS blows the water out of your run of the mill TN. TL;DR I've used both 144hz, 1080p IPS, 1440p IPS. 144Hz is nice but isn't game changing and doesn't seem for you. 1440p IPS 144Hz like the ROG Swift is an option and a good option at that, but you'll be paying for it and your GPU probably can drive such a beast. I think a cheap 1440p IPS monitor is for you.