i have just popped over to our local Apple shop. and looked at the apple cinema displays: 23" and 30". the difference in price is almost double for the 30". where do the advantages come into place with a 30" display. im totally new to digital, so just setting up my digital darkroom... im a portrait/fashion photographer... what are the pluses of a 30"? is it only the size? or do colors, etc on screen change as well?