There is a slew of cheap LG paneled 22-23" IPS monitors available now for under $250 USD. I'd stay clear of the LED backlit models in this range.
I hadn't seen any of these until just now. Now I see, for instance,
LG IPS226V-PN $180 = http://www.newegg.com/Product/Produc...82E16824005230
At $180 shipped, it's substantially less expensive then the Dell 2311.
It's LED backlit though. Not good for photo editing?