I think there is no right answer to this question. It's like saddles - everyone swears by their own favorite solution, and no one can agree. I can't even agree with myself, so I switch bars about every month. One thing I can definitely recommend is that you invest in a stem where the clamp comes off completely so you can remove bars without unwrapping. Also, brake levers with a hinge. Either that, or have lots of quill stems and lots of brake levers, and create a series of different setups. Then all you have to do is switch cables. Better yet, don't use brakes.