After reading a lot of previous questions on monitor calibration, I am still confused. It seems that for monitor calibration (no printer profiling), there are two often recommended solutions that should work with my Macintosh OSX 7 (Lion) system and a HP LP2475w monitor: i1Display Pro ($249 at BH) ColorMunki Display ($169 at BH) Apparently the i1Display is a colorimeter and the ColorMunki is a spectrophotometer. Considering the prices (my budget is tight), how important is that difference? The time required for calibrating is of no importance to me, and I don't need the end result to be better than what I can reasonably see. Most of my work is in B&W, but I do some work in colour and sometimes I add a hint colour to B&W shots using split toning.