if this is for comfort, keep your drop bars, get the Oval Concepts R800 stem and A710 or A711 stem plate, and Profile-design CGT clip-on aero bars for road bikes.
short extension bars, ideal for not over-extending. very comfy bars, and the Oval Concepts stem/plate combo allows you to clip them to your existing bars even if they are flat-tops, by putting the clamp rings on the stem plate, under the bars.