U2413 I think almost close to RM2k or something. It's of a totally different standard, a much higher quality panel. Something like 100% sRGB, 99% AdobeRGB

If you're looking at the Spyder4 Express, it goes for RM400+, Spyder4 Pro goes for RM600+ Downside of the Express version is that you can only use it on ONE computer and there's no ambient light detector.

Anyway, no need to get calibrator la, just find me will do  
I'd go for the U2412M for the extra vertical pixels (1920X1200) which can be helpful when displaying/editing vertical oriented pictures