I think the responses highlight the problem of asking what is the "best" bar. People use all varieties to tour successfully so it really comes down to subjective opinion. One can talk objectively about the physical characteristics but in the end most people are remarkably adaptive at making most things work and there is a strong social pull towards fitting in with the crowd or what's "hot" or "cool".

As noted earlier, the easiest and cheapest thing for the OP to do is switch from Jones bars to butterflies. It will cost <$50 probably and he can sell the Jones as many people want them. See if that works. If not, start specing out a drop bar conversion. It's a cost effective plan. Asking what other like isn't a good solution because, everybody likes something different and you just get more confused and paralyzed by indecision.