I originally tried the BMW grips that I heard so much about, and really wasn't that impressed with them. They didn't seem to help with any of the vibration, and my right hand was still bothering me.
I then decided to try out the Tacki-grips since they were only about $10. My first impression of them was not too good either. I though they were too big, and my thumb was now going numb. The rest of my hand was fine, but the whole thumb thing really bothered me. I think the reason for this is because of the size of my hands. I think if my hands were a little larger, I wouldn't have the whole 'numb thumb' problem.
I've considered using some foam grips that a few people have suggested to me but the Tacki-grips are OK, and they were a pain in the *** to put on, so I'm just dealing with it for now. Overall, I would say try a few different grips, and decide what works best for you.