It seems all monitors are settling on HD's 1080 resolution, no matter how big. I think it's marginal on a 21" monitor, too low for a 24.
There are lots of higher-end monitors at 1920x
1200. Mostly those use IPS or better technologies, and carry a higher price tag to match.
Here, we picked up a pair of ASUS 25.5" displays, 1920x1200, for $260 each, plus the hope of someday getting $30 (each) back from that on a MIR. Not IPS tech, but good enough for programming and web use.
Our (Dell) notebooks also have 1920x1200 resolution screens.
Cheers