+1 on the Isos. I've used them for years and really like both the feel and the looks of them. I've used other brands with "rubber" in them, but they would soon turn my palms black. The Isos don't do that. But your choice.
I have had the Ailerons also on quite a few bikes now. They are very comfortable and are contoured to your hand. Highly recommended.
I just realized there is/are two different items called "throttle boss". One is a metal end cap that fits Iso grips only, and the other is a plastic slip on type palm rest (throttle rocker is a popular brand). I have both, and they are both worth having IMO.