Dear Greg,
The answer depends upon your absolute needs, where I would try to recommend that you incorporate a calibration software package that adds value to your image making process, but that economic decision will be answered by yourself. There are a few good packages available, where I do however recommend ColorEyes Display Pro calibration software for your iMac. Their url is located here: http://www.integrated-color.com/cedp...esdisplay.html
It is the best software to address your iMac's screen brightness and colour balance properly. I would suggest too that your review their forum group for further assistance. Although they recommend the Spyder 3, and now package the Spyder 3 with their software, I found that the older "DTP-64" calibration puck addresses the "White Balance" better. The authors of the software do acknowledge within their forum that the "DTP-64" is better, and many folks request the Spyder 3 calibration tool because they are told that they require a calibration tool that can accommodate the latest wide gamut screens. Unfortunately, I do not accept the Spyder 3 marketing hype nor did I see any improvement while using this calibration tool, matter of fact I do not have a desire to use the Spyder 3 calibration tool. I too find the "DTP-64" better with the monitor's white balance.
If you have access to a "DTP-64" through an associate, I would recommend that you try each calibration tool, and then make your own decision, based upon your results. My dissatisfaction with the Spyder 3 should not influence your decision. That said, each calibration tool has a distinct personality, and a properly calibrated monitor will add value to your long term image making routine.
Just my two pennies...
jim k
Bookmarks