I built a computer recently. I went with a dual monitor setup though and like it that way. I currently use it for work so a decent amount of screen space is needed. However one of my monitors is only a 22" which works perfect for me as I don't want my desk to be overfull. An Ultrawide would be my other choice but it would crowd my desk a lot. My desk is only 46" wide. Have to say though, 144hz monitor with games seems nice to me.
The computer build is meant to be quiet. I went with a Nvidia Founders 2070 Super, and regret it some now because I want to switch to an MSI but it feels wasteful to do so now. Why? Purely because of noise, the founders makes a little bit more noise than some other GPUs (but it does look damn nice). I put all BeQuiet fans in the front of the enclosure and the CPU cooler is very quiet too - all 4 pin so they spool down when it's not hot. I went from mini ITX case to micro ATX not because I needed the room but wanted more airflow to reduce some noise without having to force as much around the video card. The enclosure is a Fractal Design Silent version, so it has damping material on the panels on the inside. I'd love to go with a fanless design but my stuff would fry because they weren't mean for high end video cards or CPU's of any kind of actual power.
I went with a HDD (enterprise) for important files and M.2 1TB for games etc. But since I finished Witcher 3 (+ expansions) I don't really know what to play now. I have a bunch of FPS games but don't care too much. I haven't played games in years so getting back in isn't as thrilling as maybe I'd hope or hoped they wouldn't be, not sure. The games look nice for sure, cranked up settings on a 2k monitor.
The hardest thing to find was a keyboard that is very slim but has decent key action, doesn't lock up from pressing too many keys at the same time, and doesn't have ctrl a mile from the Z (gamers understand that). Turns out Lenovo makes
this keyboard and it's the keyboard EVER. Everything else makes my hands achy, has limited button pressing, makes super loud noises, etc etc. I do admit I have a number pad though with mechanical buttons so I can hammer on it though (weighs like a 1lb, very cool). I'm really particular for this stuff. I use a Roccat Kone Pure mouse and it's the best gaming mouse ever. Funny enough though for non-games I have been using a different mouse. Original I thought I'd just pick one but I like a different mouse for different functions... I might just get rid of the other one, don't know yet. The worst part about nice mice today is their stupid RGB crap.
Do you use monitor arms? I'll never go without them ever again, so much more deskspace/open feel. The last thing I had to figure out was a desk lamp that wasn't worthless. I ended up
getting this and the tall height makes it worthy unlike everything else designed for hipsters that write shit poems in notebooks that they later apologize in advance for reading at coffee houses... and will never own anything taller than a 15" Mac laptop. Seriously, most desk lamps are stupid low.