The HP LP2275w just came out for about $459. It has a 22" 1680x1050 S-PVA panel like the one in the EIZO S2231W. That panel is known to have a high static contrast ratio of close to 1500:1. There are some other 22" EIZO models that aren't TN, but they're very expensive.
The only other one I know about that's currently available is the Lenovo L220x.