Andrew (and Jeff),
But, am I crazy to think that two monitors which are properly profiled (to the same ct, gamma, brightness) would "look" the same in terms of brightness (and color)? I thought that was the point of profiling, to try to achieve a uniform standard across different devices?
You certainly are not crazy. But this isn't a prefect world.
I recall a few years ago, calibrating and profiling a display using an instrument but two different software packages, both set to the same targets. I figured I'd get the same results. I didn't. Now take two differing software packages and even the same instrument and add another display into the mix. I'm not at all surprised that they don't match.
Now IF you had say two of the same Eizo or SpectraView II models. Same software. You'll get a strong match if the instruments and such are up to snuff. That's why it's kind of a good idea to select a make and stick with it IF your goal is a collaborative viewing system.