What is a reliable instrument to calibrate my monitor? I have a Macbook Pro that I bought about 3 years ago and I've never changed the default settings. There have been a few times I've touched up a photo sent it to be printed, and it came back looking different than what I was seeing on the monitor. Most of the time it comes back much brighter. Anyway, I've seen the Spyder ones...are those the best or is there another you'd recommend? I guess my budget is around $100.