What monitor are you considering?
In my opinion, 32" is a fine size, particularly with a curve.
The larger, the more immersive.
I use a 40" 4k monitor which seems to be a good size.
But, the larger the monitor, the more you need a curve to be able to see the edges straight on.
If you get one, keep your 23" monitor as a side monitor for such as email and performance monitors.