Here's a review of the 2407-HC with calibrated gamut charts. For comparison, this is a review of the Samsung 245B from the same site.
CRTs have one major problem for colour work, they are very dim compared to LCDs (and grow dimmer as they age) and need to be used in a darkened room if you want any sort of accuracy. You can crank up the brightness, but that blows away the white-point.