http://www.colormunki.com/product/sh...gner_type=true
i think that one would be fine for your purposes. It does color and white-balance. Ambient is nice but not necessary. The idea is, with different lighting in the room, it reflects off the monitor and alters colors, but if you always use the pc in room that has stable lighting.. no need for the extras. Just color and white balance are the important parts.