I've searched this forum for a comparison of colorimeters, but I've not been able to find what I am looking for. I apologize, because I suspect this has been discussed many times.
I see many colorimeters on the market, but I have not seen much in the way of differentiating features. For instance, there is the 'i1 display 2' and 'i1 display LT', both of which seem to have similar functionality. I also see similar products from Spyder (Spyder 2 express, Spyder 3 Pro).
What are the differences between the entry level colorimeters and the next level? What features should I be looking for? Are there web sites that evaluate and review colorimeters?
I am looking for a colorimeter for basic monitor calibration for photo editing. I am not currently doing any printing, but that could be in the future. (I do have a video projector I use for movies, so calibrating that would be nice, but not critical)