Choose one with a powerful steam thrust, which is as effective as starch. Get a variable steam feature that adjusts for various materials. And go for a high wattage (1,400 watts, say), because stronger heat means more-effective steam. Heavier irons (three to four pounds) do some of the muscle work for you. An automatic shutoff turns off the iron if it tips over.
Best Bet: The Rowenta Ultra Professional ($120; for store locations, go to www.rowentausa.com).