+1 on the Aileron grips. I went from stock to those.
No matter what, I think a "rubber grip" is better than the all metal ones.
My wife's Dyna has metal. It is fine for a short ride, but after about an hour, my hands bother me.
Some of the gloves with the gel pads in the palm help as well.
Pay attention to the models though, so they fit your "throttle by wire" system.