Q. I want to invest in a watch, something sophisticated but stylish. What are my options?
A. The ruggedly masculine TAG Heuer Monaco, a cult classic from 1969, transcends trends and is worth the price. The square face and blue dial look as sharp today as they did back then. Want to test-drive the chunky men's look? Pick up the less expensive Guess? Watches "Protege." If you prefer something more ladylike, however, go with the Citizen Eco-Drive Lucca ($500; citizenwatch.com). It's serious enough for daytime, but with 40 diamonds and a mother-of-pearl face, it dazzles at night. Plus, it has an ingenious light-fueled power system, so you never need to replace the battery.