Alloy bars are my choice. YMMV. I just got a set of Pro Vibe 7s compact II bars. They don't taper from the stem to the curve to the levers so they are very comfortable if you like to ride on the tops. The curvature is such that no matter where you like your hoods, the reach to the levers from the drops is about the same. It is not rocket science but so few bars are like that. Short reach, long drops (I like them!). I believe they also come in CF, albeit for more money.