I have an Asus VW222U and it's completely awesome. As far as 22" monitors go it's probably the best value for money at around the 300 mark.
Be aware of the fact that the Wii displays maximum 480p, and with a monitor with a higher resolution the display is blurry, which is why I haven't bothered connecting my wii up to the monitor yet.
Also, MSY is cheap. Buy from them.