Originally Posted by
DanK
I would strengthen what Len said; if you don't calibrate your monitor, it's just a roll of the dice whether your prints look like your screen. I've calibrated quite a number. Some were very close to accurate right out of the box, but others were not even close. If you use an X-Rite device to calibrate your monitor--I assume this is the same for datacolor devices, but I have never used one--the default calibration will take care of all color settings. I don't recall whether the default luminance was correct, and I can't check because my current monitor uses proprietary NEC software, and using that I set the luminance manually. People differ in terms of where in the range Len posted they like to work. I have ended up around 110 cd/m2.
Good luck, and post questions if you get stuck.