I will try to give some guidance from my knowledge of monitors
I think 30k is a bit high to spend on a 27 inch monitor. You can get 4k 32 inch monitors for that price. (BenQ EW3270U, or better ones at 35k range)
This is how i will order your choices, according to how good they are : (price is given in the brackets)
1. LG Ultragear 27GP850 - Great monitor. My friend has it and I have used it. I have also used the smaller 24 inch 1080p 24GN65R for 1 year, no complaints. (31.5k) (1 ms response time, 400 nits)
2. Dell UltraSharp U2724D - Great monitor from what i see in the reviews. Don't have personal exp with dell monitors (30k)
3. BenQ Mobiuz EX2710Q - Great panel. Good company, they usually make robust displays. I don't like that the brightness is a bit less (250 nits), also can not be pivoted to left and right like the above two ones. (31k)
4. Gigabyte M27Q Rev 2.0 - I feel gigabyte monitors are average. My friend has a G24F (24 inch 1080p), it's cheap and pretty average. I am currently using a Gigabyte 32QC for the last 1.5 years. Nothing spectacular about it. Gets the job done... (26.6k)
5. Asus TUF VG27AQ3A - I don't have personal exp with asus monitors but from what i have heard Asus tuf doesnt make that great ones. I think this is overpriced to the competition, from a review i checked. (30k)
6. Acer Nitro Xv272U V3 - the cheapest one and quality will be lower compared to the others. It is a very good budget choice. (17k)
I am actually not sure how this is so cheap. Even the doc i shared at the end from 2022 has it's price as 24k...
Above list is just an order of performance, im not considering price for it. Personally i would buy the
Acer Nitro Xv272U V3 since it is so cheap and still delivers like 75% of the other ones..
OR buy a 4k 32 inch like i mentioned...
From the above list, you should buy the
LG Ultragear 27GP850 since it is the best... Has a very good brightness, 400 nits and peak of 470. Beats everything else in terms of raw specs, the monitor stand is also really good.
I used to watch 'Type c tech reviews' on youtube and he tested this monitor.. I believe it was actually 1 ms response time like the manufacturer mentioned, unlike 90% monitors where that's not the case. Usually 5 ms will be like 10 ms when it is tested... But since you mentioned you dont game that much, it's not something to care about that much.
The top three are on a level higher than the bottom three.
I like displays which can be tilted, height adjusted and pivoted with their stock monitor stands... In this price range those are a must. Do check it before buying...
You can use this site if you want check specs -
www.displayspecifications.com
For reviews use youtube, rtings, pcmonitors.info, or some other sites like pcmag, tomshardware.
docs.google.com
You can check this doc for some details... Not my list....
Also one last thing, i think you can get better prices if you wait for some sale... I dont think the prices right now are that good, except for the acer one, thats a good price. (I bought my LG 24GN65R for 17k in 2022
)