Based on observation I'd say tangerine and lime are the least popular iMac colors. Blueberry, grape, and strawberry would probably be tops in that order out of the original fruit colors.

The 740i was more expensive than the regular 740 in its day; I bought a regular beige 740 with my tangerine iBook for that reason. They're good printers unless yours fell victim to the streaking issue or if you need vibrant shades of red--the reds on mine tended to be a bit dark. Pretty decent quality prints though, I used mine everyday from 2000-2003 and continued to use it for two years after that as a second printer before I got my LaserJet.