I will choose Barcons every time, over down tube shifters. Barcons do not require the rider to remove his or her hands from the bars. There is never the urge to look down as one reaches. The Barcon has the exact same feel as the Suntour Power Shifter, one of the best down tube shifters ever made, in my opinion.
Once you go to Barcons, it is unlikely you will ever want to go back to down tube shifting. I ran Barcons on my
Motobecane Grand Jubilee and tried them with drop bars and mustache. Perfect for either...