Since this topic pops up now and then, I always say that if you occasionally use your drops, then stay with a drop bar but if you always ride the tops then consider a trekking bar for more hand positions than a flat bar. I used trekking bars on a couple touring bikes that I built up but I found that I missed my drops in the wind and so have gone back to drops (Plus you get more style points for looking faster and more cool with drops)