I recommend the one I just purchased. It's a 17 inch ultra flat x-tron family (mitsubishi calls it DiamondTron) Mitsubishi DiamondPoint SB70. The colors and brightness this monitor offers is remarkable.
Of course, it's only a 17 inch, but costs around $179 at best buy for a black one, and comes with (i think) a $30 BB-MIR (god help us).
It's a fine monitor for it's class and very cheap compared to other trinitron monitors around. If your planning to go trinitron, go with the mitsubishi. Other than that, you might try finding a deal on newegg.
The reason I went to best buy is because they had a very high end monitor that matched my case for a good price.