Although it’s not cheaper the Spyder Calibration system will provide a much better end result than the Huey products. I’ve used both and I prefer Spyder products, as do must photographers I know. This product has a monitor scanner like the Huey solution which sets up a monitor profile AND has a separate scanner that will calibrate your printer color profile. Having both profiles in sync provides the ultimate end result.

-Joe

In most cases, either the Huey or the Spyder will do an adequate job calibrating a typical monitor. Your wife’s iMac is a different story, however. Modern iMacs are notorious for being too bright to be able to match what a printer’s output looks like in ordinary home or office lighting situations. I’ll bet your wife’s pictures look too dark compared to her screen. And unfortunately, you can turn down the iMac’s brightness controls to zero and it will still be too bright.
I have an article on some of the options you would have to fix this:
but it will probably involve buying new software and a different colorimeter than a Huey.

You should get the screen brightness figured out before you look at the printer profile. If you are not that technically minded, you probably would want a service like ColorValet to make the printer profile for you. A couple of nice things about ColorValet is that we have technical support people available to walk you through the process & answer your questions - and we offer a 100% money back guarantee.

http://www.colorwiki.com/wiki/My_Printer_Is_Too_Dark