calibrate monitor

I am trying to decide which calibration tool to buy for my monitor. I came across an advertisement for "Eye-One Dispay 2" whcih looks and sounds like it would be great. But does it work and are there any alternatives. Alos is it hard to use. I'm shooting with a Canon XTi and what I see on my camera LCD is much brighter than what I see on my LCD monitor. Also my colors in Photoshop seem to be too red judging from what I get back in finished photos from the lab. I"ve tried using Adobe Gamma but it doesn't seem to cut it. Any suggestions would be appreciated.