SP Tapered Bars

The last few bars I've bought have all been pro-tapers and they've held up pretty well.
Width, pull-back, rise height are all based on your personal preference.

I like a wide, tall bar with very little pull-back so that it's comfortable standing up and gives me the most leverage, but I'm used to riding dirt bikes. At the other end of the spectrum, a low, narrower bar with more pull-back will be more comfortable cruising at higher speeds and tucking in.

The other dimension to check is the control area. You want to make sure there's enough straight section to mount the grips you like, controls, and mirrors. Clamp width usually isn't a big problem.