I went with an LG L227WTG monitor.
It's a 22" TN panel monitor.
It has 0 input lag and is like a CRT in that regard. It's great for gaming, Internet browsing, etc., but not that spectacular for video, but then again, about what you expect from a TN panel though.
I'm really using this as a stop gap, until I eventually get a new desk that will fit a bigger monitor and when I have the money for a more expensive IPS panel.