So, I have had the same monitor on my computer for over ten years now. Any recommendations for a new one? I have noticed it's starting to look a bit dim.

Samsung anything imho

https://www.amazon.com/ASUS-Ultrawide-Curved-Monitor-PG34WCDM/dp/B0D892Y5D2/ref=sr_1_16?crid=3M6Q699IDJ4T&dib=eyJ2IjoiMSJ9.KkTu-si7k5iZV2S_ljARlD66ijKrAQCKcGwAN5itk6hRAdhTAqgNi-vqfly0nX02ET9R8O8y230OzfHYZvoUCh6S-1COY8Mo8P9iOBGO-i6mtWEVX4Y6HhC3RiTFVPSmXCWtrz3tdKuf68aOwu5oNwmL2JB57_TW5U9lpPy-1P4f88Rr-UpseNRBrrTCHcPciGmV3j7K9izrHKV8SF_hiymODZIQWYkqOd3e1X7sc2k.AUIUWgHHlMosnKYiqJSlZ988LTbxUJ935bR_tGTfeok&dib_tag=se&keywords=ASUS+34%22+240+Hz+OLED+Curved+Gaming+Monitor+NVIDIA+G-Sync+3440+x+1440+%282K%29+DCI-P3&qid=1727654382&sprefix=asus+34+240+hz+oled+curved+gaming+monitor+nvidia+g-sync+3440+x+1440+2k+dci-p3%2Caps%2C102&sr=8-16

 
GEEEEEEEEEEEEEEEEZ man... I'd have to be 5' away from that thing to even play it.

depend on what your after, my plan is to upgrade to a qd-oled monitor when they drop in size and price a bit
i don't need anything to crazy some thing about 20"-24" at 1440p would be great but as far as i can find they
aren't available yet. But for best colour oled for best price ipc lcd

Asking what's a good screen is like asking what kind of car to buy.  So many options.   Price range?   Screen size preference?

I've ran a 32" for years.  my last one was flickering and not powering on I kept having to unplug it and plug it back in.  i picked up this 34" uw from costco
last summer and while it looked smaller I've gotten use to it. and less space with a monitor above it. which is a 27" ips i got from best buy on sale for under $100 so got a few.
4 screens total.   downfall of the ultra wide is not all games support it.   it measures 13 1/4 tall and the 27 is 13 1/2 tall if this helps in deciding.  and 31 wide vs 24 wide between them.

Imo a 27" is good enough but the 34 sure looks cooler ha-ha.   a O-led is gonna be the ultimate in brightness and quality but it's also 3x if not more the price.  I still can't justify paying over 300
for a monitor when a 70" tv is $400 now.   hope this helps