If you use photoshop more, and color accuracy is more important to you, then you'll need an 8-bit monitor such as the Viewsonic VX2025wm (20"). Availability is a problem though. Other option is the Dell 2007, but this'll strech your budget to its limit.
If you use maya more, and screen space is of more importance, then simply go for 2 17" monitors. The Samsung 740n is just over 10K, so with a bit of bargaining, you should get two for 20K. Or you could inquire about 19" monmitors as well. I feel getting to standard 4:3 monitor's would be better than two widescreens.