I would agree with michael d totally on this one. Projectors like many types of monitors, can shift over time so having the ability to repeat the process again is advantageous. Until you have some sort of device to measure these changes, you can never really see the gradual changes with the naked eye. If the RS45 has a multi-point grayscale calibration system in the service menu, then you really won't need to spend the considerably extra cash on something like the Lumagen to do an accurate calibration. You would then only need the calibration software(Chromapure/Calman), a meter and a good calibration disc, like the one that has already been suggested(AVS HD709) and your set.
Certainly, there is a learning curve but once you get the hang of it, it becomes quite addictive and it is amazing the improvements you can make. I have the Chromapure Software(much cheaper than Calman and easier to use especially for the novice)and an Eye Display 3 Pro meter which is useable for all types of display devices. You are probably looking at another $500 or so for this, but you will spend almost all of that on one professional calibration alone, should, of course, you wish to do that.
The discs like Spears and Munsil, Wow, THX calibrations etc. are OK for basic calibration of color, tint, brightness etc. but when it gets in to the ability to attain considerably more accurate levels of multi-point grayscale, which is vital for color accuracy along with Gamma and color management accuracy up and down the total luminance scale, in order to achieve this much greater accuracy, the above equipment would be required.
